99626580 has 36 divisors (see below), whose sum is σ = 302201172. Its totient is φ = 26567040.

The previous prime is 99626507. The next prime is 99626609. The reversal of 99626580 is 8562699.

99626580 is a `hidden beast` number, since 9 + 9 + 62 + 6 + 580 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15023376 + 84603204 = 3876^2 + 9198^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 276561 + ... + 276920.

It is an arithmetic number, because the mean of its divisors is an integer number (8394477).

Almost surely, 2^99626580 is an apocalyptic number.

99626580 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99626580 is an abundant number, since it is smaller than the sum of its proper divisors (202574592).

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

99626580 is a wasteful number, since it uses less digits than its factorization.

99626580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553496 (or 553491 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 99626580 is about 9981.3115370677. The cubic root of 99626580 is about 463.5804086819.

The spelling of 99626580 in words is "ninety-nine million, six hundred twenty-six thousand, five hundred eighty".