23977920 has 56 divisors (see below), whose sum is σ = 76132944. Its totient is φ = 6393856.

The previous prime is 23977909. The next prime is 23977957. The reversal of 23977920 is 2977932.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11529 + ... + 13448.

Almost surely, 2^23977920 is an apocalyptic number.

23977920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23977920 is an abundant number, since it is smaller than the sum of its proper divisors (52155024).

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

23977920 is a wasteful number, since it uses less digits than its factorization.

23977920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24997 (or 24987 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 23977920 is about 4896.7254364524. The cubic root of 23977920 is about 288.3614289469.

The spelling of 23977920 in words is "twenty-three million, nine hundred seventy-seven thousand, nine hundred twenty".