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BaseRepresentation
bin101001111101…
…1000110000000
31112101201022211
41103323012000
521113000000
62103311504
7354665641
oct123730600
945351284
1022000000
1111466a20
12744b594
134733869
142cc96c8
151de87ba
hex14fb180

22000000 has 112 divisors (see below), whose sum is σ = 59764860. Its totient is φ = 8000000.

The previous prime is 21999977. The next prime is 22000001. The reversal of 22000000 is 22.

Adding to 22000000 its reverse (22), we get a palindrome (22000022).

Multipling 22000000 by its reverse (22), we get a square (484000000 = 220002).

22000000 divided by its reverse (22) gives a 6-th power (1000000 = 106).

It can be divided in two parts, 2 and 2000000, that multiplied together give a square (4000000 = 20002).

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1999995 + ... + 2000005.

Almost surely, 222000000 is an apocalyptic number.

22000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29882430).

22000000 is an abundant number, since it is smaller than the sum of its proper divisors (37764860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22000000 is an frugal number, since it uses more digits than its factorization.

22000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 4.

The square root of 22000000 is about 4690.4157598234. The cubic root of 22000000 is about 280.2039330655.

The spelling of 22000000 in words is "twenty-two million", and thus it is an aban number and an uban number.