23732640 has 72 divisors (see below), whose sum is σ = 80992548. Its totient is φ = 6328320.

The previous prime is 23732609. The next prime is 23732669. The reversal of 23732640 is 4623732.

It can be written as a sum of positive squares in 2 ways, for example, as 23386896 + 345744 = 4836^2 + 588^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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, 6801 + ... + 9680.

Almost surely, 2^23732640 is an apocalyptic number.

23732640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23732640 is an abundant number, since it is smaller than the sum of its proper divisors (57259908).

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

23732640 is a wasteful number, since it uses less digits than its factorization.

23732640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16502 (or 16491 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 23732640 is about 4871.6157483940. The cubic root of 23732640 is about 287.3748011897.

The spelling of 23732640 in words is "twenty-three million, seven hundred thirty-two thousand, six hundred forty".