23900639928 has 64 divisors (see below), whose sum is σ = 66288412800. Its totient is φ = 7119857280.

The previous prime is 23900639927. The next prime is 23900639929. The reversal of 23900639928 is 82993600932.

It is an interprime number because it is at equal distance from previous prime (23900639927) and next prime (23900639929).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23900639921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751651 + ... + 782802.

It is an arithmetic number, because the mean of its divisors is an integer number (1035756450).

Almost surely, 2^23900639928 is an apocalyptic number.

It is an amenable number.

23900639928 is an abundant number, since it is smaller than the sum of its proper divisors (42387772872).

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

23900639928 is a wasteful number, since it uses less digits than its factorization.

23900639928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534532 (or 1534528 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 23900639928 in words is "twenty-three billion, nine hundred million, six hundred thirty-nine thousand, nine hundred twenty-eight".