99797680 has 40 divisors (see below), whose sum is σ = 239520384. Its totient is φ = 38630400.

The previous prime is 99797669. The next prime is 99797681. The reversal of 99797680 is 8679799.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (99797681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17641 + ... + 22600.

Almost surely, 2^99797680 is an apocalyptic number.

It is an amenable number.

99797680 is an abundant number, since it is smaller than the sum of its proper divisors (139722704).

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

99797680 is a wasteful number, since it uses less digits than its factorization.

99797680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40285 (or 40279 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 99797680 is about 9989.8788781446. The cubic root of 99797680 is about 463.8456432661.

The spelling of 99797680 in words is "ninety-nine million, seven hundred ninety-seven thousand, six hundred eighty".