23183640 has 48 divisors (see below), whose sum is σ = 75348000. Its totient is φ = 6182208.

The previous prime is 23183639. The next prime is 23183659. The reversal of 23183640 is 4638132.

It is a happy number.

23183640 is a `hidden beast` number, since 2 + 3 + 18 + 3 + 640 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31840 + ... + 32559.

It is an arithmetic number, because the mean of its divisors is an integer number (1569750).

Almost surely, 2^23183640 is an apocalyptic number.

23183640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23183640 is an abundant number, since it is smaller than the sum of its proper divisors (52164360).

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

23183640 is a wasteful number, since it uses less digits than its factorization.

23183640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64416 (or 64409 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 23183640 is about 4814.9392519532. The cubic root of 23183640 is about 285.1415732447.

The spelling of 23183640 in words is "twenty-three million, one hundred eighty-three thousand, six hundred forty".