22640752 has 20 divisors (see below), whose sum is σ = 44695800. Its totient is φ = 11106368.

The previous prime is 22640749. The next prime is 22640759. The reversal of 22640752 is 25704622.

It is a super-2 number, since 2×22640752² = 1025207302251008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22640752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12502 + ... + 14197.

It is an arithmetic number, because the mean of its divisors is an integer number (2234790).

Almost surely, 2^22640752 is an apocalyptic number.

It is an amenable number.

22640752 is a deficient number, since it is larger than the sum of its proper divisors (22055048).

22640752 is a wasteful number, since it uses less digits than its factorization.

22640752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26760 (or 26754 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 22640752 is about 4758.2299229861. The cubic root of 22640752 is about 282.8982640718.

The spelling of 22640752 in words is "twenty-two million, six hundred forty thousand, seven hundred fifty-two".