99172782 has 32 divisors (see below), whose sum is σ = 227496960. Its totient is φ = 31990680.

The previous prime is 99172771. The next prime is 99172819. The reversal of 99172782 is 28727199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27948 + ... + 31295.

It is an arithmetic number, because the mean of its divisors is an integer number (7109280).

Almost surely, 2^99172782 is an apocalyptic number.

99172782 is an abundant number, since it is smaller than the sum of its proper divisors (128324178).

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

99172782 is a wasteful number, since it uses less digits than its factorization.

99172782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59285 (or 59279 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 99172782 is about 9958.5532081724. The cubic root of 99172782 is about 462.8754693410.

The spelling of 99172782 in words is "ninety-nine million, one hundred seventy-two thousand, seven hundred eighty-two".