99870788 has 12 divisors (see below), whose sum is σ = 175334460. Its totient is φ = 49775232.

The previous prime is 99870787. The next prime is 99870833. The reversal of 99870788 is 88707899.

It can be written as a sum of positive squares in 2 ways, for example, as 40857664 + 59013124 = 6392^2 + 7682^2 .

It is not an unprimeable number, because it can be changed into a prime (99870781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38633 + ... + 41136.

It is an arithmetic number, because the mean of its divisors is an integer number (14611205).

Almost surely, 2^99870788 is an apocalyptic number.

It is an amenable number.

99870788 is a deficient number, since it is larger than the sum of its proper divisors (75463672).

99870788 is a wasteful number, since it uses less digits than its factorization.

99870788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80086 (or 80084 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 99870788 is about 9993.5373116830. The cubic root of 99870788 is about 463.9588808687.

The spelling of 99870788 in words is "ninety-nine million, eight hundred seventy thousand, seven hundred eighty-eight".