99730080 has 72 divisors (see below), whose sum is σ = 340333812. Its totient is φ = 26594304.

The previous prime is 99730073. The next prime is 99730087. The reversal of 99730080 is 8003799.

It is an interprime number because it is at equal distance from previous prime (99730073) and next prime (99730087).

It can be written as a sum of positive squares in 2 ways, for example, as 98962704 + 767376 = 9948^2 + 876^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 (99730087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33189 + ... + 36068.

Almost surely, 2^99730080 is an apocalyptic number.

99730080 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99730080 is an abundant number, since it is smaller than the sum of its proper divisors (240603732).

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

99730080 is a wasteful number, since it uses less digits than its factorization.

99730080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69278 (or 69267 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 99730080 is about 9986.4948805875. The cubic root of 99730080 is about 463.7408878316.

The spelling of 99730080 in words is "ninety-nine million, seven hundred thirty thousand, eighty".