22640774 has 32 divisors (see below), whose sum is σ = 38144736. Its totient is φ = 10010880.

The previous prime is 22640773. The next prime is 22640777. The reversal of 22640774 is 47704622.

It is a self number, because there is not a number n which added to its sum of digits gives 22640774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71264 + ... + 71580.

It is an arithmetic number, because the mean of its divisors is an integer number (1192023).

Almost surely, 2^22640774 is an apocalyptic number.

22640774 is a deficient number, since it is larger than the sum of its proper divisors (15503962).

22640774 is a wasteful number, since it uses less digits than its factorization.

22640774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 22640774 is about 4758.2322347695. The cubic root of 22640774 is about 282.8983557024.

The spelling of 22640774 in words is "twenty-two million, six hundred forty thousand, seven hundred seventy-four".