99620556 has 48 divisors (see below), whose sum is σ = 270170880. Its totient is φ = 27979200.

The previous prime is 99620537. The next prime is 99620569. The reversal of 99620556 is 65502699.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5095 + ... + 15006.

It is an arithmetic number, because the mean of its divisors is an integer number (5628560).

Almost surely, 2^99620556 is an apocalyptic number.

It is an amenable number.

99620556 is an abundant number, since it is smaller than the sum of its proper divisors (170550324).

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

99620556 is a wasteful number, since it uses less digits than its factorization.

99620556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20174 (or 20172 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 99620556 is about 9981.0097685555. The cubic root of 99620556 is about 463.5710649081.

The spelling of 99620556 in words is "ninety-nine million, six hundred twenty thousand, five hundred fifty-six".