22073472 has 80 divisors (see below), whose sum is σ = 65721150. Its totient is φ = 7354368.

The previous prime is 22073453. The next prime is 22073477. The reversal of 22073472 is 27437022.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 1498176 = 4536^2 + 1224^2 .

It is a super-2 number, since 2×22073472² = 974476332269568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22073477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9304 + ... + 11432.

Almost surely, 2^22073472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22073472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32860575).

22073472 is an abundant number, since it is smaller than the sum of its proper divisors (43647678).

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

22073472 is an equidigital number, since it uses as much as digits as its factorization.

22073472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 22073472 is about 4698.2413731097. The cubic root of 22073472 is about 280.5155128828.

The spelling of 22073472 in words is "twenty-two million, seventy-three thousand, four hundred seventy-two".