99997100028 has 72 divisors (see below), whose sum is σ = 290720629472. Its totient is φ = 28388610432.

The previous prime is 99997100017. The next prime is 99997100029. The reversal of 99997100028 is 82000179999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99997100029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1224175 + ... + 1303302.

Almost surely, 2^99997100028 is an apocalyptic number.

It is an amenable number.

99997100028 is an abundant number, since it is smaller than the sum of its proper divisors (190723529444).

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

99997100028 is a wasteful number, since it uses less digits than its factorization.

99997100028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527651 (or 2527646 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The spelling of 99997100028 in words is "ninety-nine billion, nine hundred ninety-seven million, one hundred thousand, twenty-eight".