99185920 has 36 divisors (see below), whose sum is σ = 237584340. Its totient is φ = 39673856.

The previous prime is 99185899. The next prime is 99185923. The reversal of 99185920 is 2958199.

It can be written as a sum of positive squares in 2 ways, for example, as 13660416 + 85525504 = 3696^2 + 9248^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99185923) 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, 37465 + ... + 40024.

It is an arithmetic number, because the mean of its divisors is an integer number (6599565).

Almost surely, 2^99185920 is an apocalyptic number.

It is an amenable number.

99185920 is an abundant number, since it is smaller than the sum of its proper divisors (138398420).

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

99185920 is an equidigital number, since it uses as much as digits as its factorization.

99185920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77510 (or 77496 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 99185920 is about 9959.2128202986. The cubic root of 99185920 is about 462.8959083811.

The spelling of 99185920 in words is "ninety-nine million, one hundred eighty-five thousand, nine hundred twenty".