99915580 has 12 divisors (see below), whose sum is σ = 209822760. Its totient is φ = 39966224.

The previous prime is 99915553. The next prime is 99915581. The reversal of 99915580 is 8551999.

It is a self number, because there is not a number n which added to its sum of digits gives 99915580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99915581) 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, 2497870 + ... + 2497909.

It is an arithmetic number, because the mean of its divisors is an integer number (17485230).

Almost surely, 2^99915580 is an apocalyptic number.

It is an amenable number.

99915580 is an abundant number, since it is smaller than the sum of its proper divisors (109907180).

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

99915580 is a wasteful number, since it uses less digits than its factorization.

99915580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995788 (or 4995786 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 99915580 is about 9995.7781087817. The cubic root of 99915580 is about 464.0282322794.

The spelling of 99915580 in words is "ninety-nine million, nine hundred fifteen thousand, five hundred eighty".