99070920 has 96 divisors (see below), whose sum is σ = 346764600. Its totient is φ = 24385536.

The previous prime is 99070903. The next prime is 99070927. The reversal of 99070920 is 2907099.

It can be written as a sum of positive squares in 4 ways, for example, as 87497316 + 11573604 = 9354^2 + 3402^2 .

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

It is not an unprimeable number, because it can be changed into a prime (99070927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5905 + ... + 15264.

Almost surely, 2^99070920 is an apocalyptic number.

99070920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99070920 is an abundant number, since it is smaller than the sum of its proper divisors (247693680).

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

99070920 is a wasteful number, since it uses less digits than its factorization.

99070920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21199 (or 21192 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 99070920 is about 9953.4375971320. The cubic root of 99070920 is about 462.7169393762.

The spelling of 99070920 in words is "ninety-nine million, seventy thousand, nine hundred twenty".