22664540 has 12 divisors (see below), whose sum is σ = 47595576. Its totient is φ = 9065808.

The previous prime is 22664533. The next prime is 22664567. The reversal of 22664540 is 4546622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566594 + ... + 566633.

It is an arithmetic number, because the mean of its divisors is an integer number (3966298).

Almost surely, 2^22664540 is an apocalyptic number.

22664540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22664540 is an abundant number, since it is smaller than the sum of its proper divisors (24931036).

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

22664540 is a wasteful number, since it uses less digits than its factorization.

22664540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133236 (or 1133234 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 22664540 is about 4760.7289357828. The cubic root of 22664540 is about 282.9973071368.

The spelling of 22664540 in words is "twenty-two million, six hundred sixty-four thousand, five hundred forty".