23728891920 has 40 divisors (see below), whose sum is σ = 73559565696. Its totient is φ = 6327704448.

The previous prime is 23728891913. The next prime is 23728891933. The reversal of 23728891920 is 2919882732.

It is a tau number, because it is divible by the number of its divisors (40).

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, 49434952 + ... + 49435431.

Almost surely, 2^23728891920 is an apocalyptic number.

23728891920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23728891920 is an abundant number, since it is smaller than the sum of its proper divisors (49830673776).

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

23728891920 is a wasteful number, since it uses less digits than its factorization.

23728891920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98870399 (or 98870393 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 23728891920 in words is "twenty-three billion, seven hundred twenty-eight million, eight hundred ninety-one thousand, nine hundred twenty".