99972028 has 24 divisors (see below), whose sum is σ = 189375200. Its totient is φ = 45904320.

The previous prime is 99972013. The next prime is 99972043. The reversal of 99972028 is 82027999.

It is an interprime number because it is at equal distance from previous prime (99972013) and next prime (99972043).

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, 5518 + ... + 15178.

Almost surely, 2^99972028 is an apocalyptic number.

It is an amenable number.

99972028 is a deficient number, since it is larger than the sum of its proper divisors (89403172).

99972028 is a wasteful number, since it uses less digits than its factorization.

99972028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9877 (or 9875 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 99972028 is about 9998.6013021822. The cubic root of 99972028 is about 464.1156011511.

The spelling of 99972028 in words is "ninety-nine million, nine hundred seventy-two thousand, twenty-eight".