22200240 has 80 divisors (see below), whose sum is σ = 69290208. Its totient is φ = 5879808.

The previous prime is 22200179. The next prime is 22200263. The reversal of 22200240 is 4200222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55722 + ... + 56118.

Almost surely, 2^22200240 is an apocalyptic number.

22200240 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 22200240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34645104).

22200240 is an abundant number, since it is smaller than the sum of its proper divisors (47089968).

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

22200240 is a wasteful number, since it uses less digits than its factorization.

22200240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22200240 is about 4711.7130642687. The cubic root of 22200240 is about 281.0514885619.

Adding to 22200240 its reverse (4200222), we get a palindrome (26400462).

The spelling of 22200240 in words is "twenty-two million, two hundred thousand, two hundred forty".