99992520 has 48 divisors (see below), whose sum is σ = 324976860. Its totient is φ = 26664576.

The previous prime is 99992509. The next prime is 99992527. The reversal of 99992520 is 2529999.

It can be written as a sum of positive squares in 2 ways, for example, as 92275236 + 7717284 = 9606^2 + 2778^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (99992527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138519 + ... + 139238.

Almost surely, 2^99992520 is an apocalyptic number.

99992520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99992520 is an abundant number, since it is smaller than the sum of its proper divisors (224984340).

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

99992520 is a wasteful number, since it uses less digits than its factorization.

99992520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277774 (or 277767 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 99992520 is about 9999.6259930059. The cubic root of 99992520 is about 464.1473100446.

The spelling of 99992520 in words is "ninety-nine million, nine hundred ninety-two thousand, five hundred twenty".