99518780 has 24 divisors (see below), whose sum is σ = 209177808. Its totient is φ = 39771648.

The previous prime is 99518753. The next prime is 99518801. The reversal of 99518780 is 8781599.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39107 + ... + 41573.

It is an arithmetic number, because the mean of its divisors is an integer number (8715742).

Almost surely, 2^99518780 is an apocalyptic number.

It is an amenable number.

99518780 is an abundant number, since it is smaller than the sum of its proper divisors (109659028).

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

99518780 is a wasteful number, since it uses less digits than its factorization.

99518780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493 (or 4491 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 99518780 is about 9975.9099835554. The cubic root of 99518780 is about 463.4131440706.

The spelling of 99518780 in words is "ninety-nine million, five hundred eighteen thousand, seven hundred eighty".