97907820 has 24 divisors (see below), whose sum is σ = 274142064. Its totient is φ = 26108736.

The previous prime is 97907813. The next prime is 97907839. The reversal of 97907820 is 2870979.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815839 + ... + 815958.

It is an arithmetic number, because the mean of its divisors is an integer number (11422586).

Almost surely, 2^97907820 is an apocalyptic number.

It is an amenable number.

97907820 is an abundant number, since it is smaller than the sum of its proper divisors (176234244).

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

97907820 is a wasteful number, since it uses less digits than its factorization.

97907820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631809 (or 1631807 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 97907820 is about 9894.8380481946. The cubic root of 97907820 is about 460.8990294312.

The spelling of 97907820 in words is "ninety-seven million, nine hundred seven thousand, eight hundred twenty".