23887987992 has 80 divisors (see below), whose sum is σ = 72991096200. Its totient is φ = 7238782080.

The previous prime is 23887987987. The next prime is 23887987999. The reversal of 23887987992 is 29978978832.

23887987992 is a `hidden beast` number, since 2 + 388 + 7 + 98 + 79 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 23887987992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23887987999) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1668517 + ... + 1682772.

Almost surely, 2^23887987992 is an apocalyptic number.

23887987992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

23887987992 is an abundant number, since it is smaller than the sum of its proper divisors (49103108208).

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

23887987992 is a wasteful number, since it uses less digits than its factorization.

23887987992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351318 (or 3351305 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 72.

The spelling of 23887987992 in words is "twenty-three billion, eight hundred eighty-seven million, nine hundred eighty-seven thousand, nine hundred ninety-two".