99520740 has 72 divisors (see below), whose sum is σ = 329329728. Its totient is φ = 24125760.

The previous prime is 99520723. The next prime is 99520769. The reversal of 99520740 is 4702599.

99520740 is a `hidden beast` number, since 99 + 520 + 7 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 99520695 and 99520704.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23152 + ... + 27111.

It is an arithmetic number, because the mean of its divisors is an integer number (4574024).

Almost surely, 2^99520740 is an apocalyptic number.

99520740 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99520740 is an abundant number, since it is smaller than the sum of its proper divisors (229808988).

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

99520740 is a wasteful number, since it uses less digits than its factorization.

99520740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50289 (or 50284 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 99520740 is about 9976.0082197240. The cubic root of 99520740 is about 463.4161863232.

The spelling of 99520740 in words is "ninety-nine million, five hundred twenty thousand, seven hundred forty".