99655920 has 400 divisors, whose sum is σ = 428514240. Its totient is φ = 21026304.

The previous prime is 99655909. The next prime is 99655939. The reversal of 99655920 is 2955699.

99655920 is a `hidden beast` number, since 9 + 96 + 559 + 2 + 0 = 666.

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

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7665834 + ... + 7665846.

Almost surely, 2^99655920 is an apocalyptic number.

99655920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99655920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214257120).

99655920 is an abundant number, since it is smaller than the sum of its proper divisors (328858320).

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

99655920 is a wasteful number, since it uses less digits than its factorization.

99655920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 99655920 is about 9982.7811756043. The cubic root of 99655920 is about 463.6259123155.

The spelling of 99655920 in words is "ninety-nine million, six hundred fifty-five thousand, nine hundred twenty".