99172140 has 24 divisors (see below), whose sum is σ = 277682160. Its totient is φ = 26445888.

The previous prime is 99172133. The next prime is 99172163. The reversal of 99172140 is 4127199.

It is a super-2 number, since 2×99172140² = 19670226704359200, which contains 22 as substring.

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, 826375 + ... + 826494.

It is an arithmetic number, because the mean of its divisors is an integer number (11570090).

Almost surely, 2^99172140 is an apocalyptic number.

It is an amenable number.

99172140 is an abundant number, since it is smaller than the sum of its proper divisors (178510020).

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

99172140 is a wasteful number, since it uses less digits than its factorization.

99172140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652881 (or 1652879 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 99172140 is about 9958.5209745223. The cubic root of 99172140 is about 462.8744705229.

The spelling of 99172140 in words is "ninety-nine million, one hundred seventy-two thousand, one hundred forty".