99807072 has 24 divisors (see below), whose sum is σ = 261993816. Its totient is φ = 33268992.

The previous prime is 99807031. The next prime is 99807091. The reversal of 99807072 is 27070899.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×99807072² = 19922903242426368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519733 + ... + 519924.

It is an arithmetic number, because the mean of its divisors is an integer number (10916409).

Almost surely, 2^99807072 is an apocalyptic number.

It is an amenable number.

99807072 is an abundant number, since it is smaller than the sum of its proper divisors (162186744).

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

99807072 is a wasteful number, since it uses less digits than its factorization.

99807072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039670 (or 1039662 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 99807072 is about 9990.3489428548. The cubic root of 99807072 is about 463.8601937100.

The spelling of 99807072 in words is "ninety-nine million, eight hundred seven thousand, seventy-two".