23978656 has 24 divisors (see below), whose sum is σ = 50840244. Its totient is φ = 11066880.

The previous prime is 23978651. The next prime is 23978659. The reversal of 23978656 is 65687932.

It can be written as a sum of positive squares in 2 ways, for example, as 17808400 + 6170256 = 4220^2 + 2484^2 .

It is not an unprimeable number, because it can be changed into a prime (23978651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28405 + ... + 29236.

Almost surely, 2^23978656 is an apocalyptic number.

23978656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

23978656 is an abundant number, since it is smaller than the sum of its proper divisors (26861588).

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

23978656 is a wasteful number, since it uses less digits than its factorization.

23978656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57664 (or 57656 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 23978656 is about 4896.8005881392. The cubic root of 23978656 is about 288.3643793256.

The spelling of 23978656 in words is "twenty-three million, nine hundred seventy-eight thousand, six hundred fifty-six".