22979640 has 32 divisors (see below), whose sum is σ = 68939280. Its totient is φ = 6127872.

The previous prime is 22979623. The next prime is 22979653. The reversal of 22979640 is 4697922.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95629 + ... + 95868.

Almost surely, 2^22979640 is an apocalyptic number.

22979640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22979640 is an abundant number, since it is smaller than the sum of its proper divisors (45959640).

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

22979640 is a wasteful number, since it uses less digits than its factorization.

22979640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191511 (or 191507 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 22979640 is about 4793.7083766120. The cubic root of 22979640 is about 284.3027585284.

The spelling of 22979640 in words is "twenty-two million, nine hundred seventy-nine thousand, six hundred forty".