23978660 has 24 divisors (see below), whose sum is σ = 50553720. Its totient is φ = 9553664.

The previous prime is 23978659. The next prime is 23978677. The reversal of 23978660 is 6687932.

It can be written as a sum of positive squares in 4 ways, for example, as 630436 + 23348224 = 794^2 + 4832^2 .

It is a super-2 number, since 2×23978660² = 1149952270791200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3152 + ... + 7608.

It is an arithmetic number, because the mean of its divisors is an integer number (2106405).

Almost surely, 2^23978660 is an apocalyptic number.

23978660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23978660 is an abundant number, since it is smaller than the sum of its proper divisors (26575060).

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

23978660 is a wasteful number, since it uses less digits than its factorization.

23978660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4735 (or 4733 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 23978660 is about 4896.8009965691. The cubic root of 23978660 is about 288.3643953601.

The spelling of 23978660 in words is "twenty-three million, nine hundred seventy-eight thousand, six hundred sixty".