22640432 has 20 divisors (see below), whose sum is σ = 43939896. Its totient is φ = 11301120.

The previous prime is 22640407. The next prime is 22640437. The reversal of 22640432 is 23404622.

It is a super-2 number, since 2×22640432² = 1025178322293248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22640398 and 22640407.

It is not an unprimeable number, because it can be changed into a prime (22640437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16808 + ... + 18104.

Almost surely, 2^22640432 is an apocalyptic number.

It is an amenable number.

22640432 is a deficient number, since it is larger than the sum of its proper divisors (21299464).

22640432 is a wasteful number, since it uses less digits than its factorization.

22640432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 22640432 is about 4758.1962969176. The cubic root of 22640432 is about 282.8969312558.

The spelling of 22640432 in words is "twenty-two million, six hundred forty thousand, four hundred thirty-two".