22907640 has 64 divisors (see below), whose sum is σ = 78543360. Its totient is φ = 5235840.

The previous prime is 22907639. The next prime is 22907663. The reversal of 22907640 is 4670922.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22907598 and 22907607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12796 + ... + 14475.

It is an arithmetic number, because the mean of its divisors is an integer number (1227240).

Almost surely, 2^22907640 is an apocalyptic number.

22907640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22907640 is an abundant number, since it is smaller than the sum of its proper divisors (55635720).

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

22907640 is a wasteful number, since it uses less digits than its factorization.

22907640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27292 (or 27288 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 22907640 is about 4786.1926413382. The cubic root of 22907640 is about 284.0055212839.

The spelling of 22907640 in words is "twenty-two million, nine hundred seven thousand, six hundred forty".