97615920 has 80 divisors (see below), whose sum is σ = 318551040. Its totient is φ = 24659712.

The previous prime is 97615873. The next prime is 97615927. The reversal of 97615920 is 2951679.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (97615927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6144 + ... + 15263.

It is an arithmetic number, because the mean of its divisors is an integer number (3981888).

Almost surely, 2^97615920 is an apocalyptic number.

It is an amenable number.

97615920 is an abundant number, since it is smaller than the sum of its proper divisors (220935120).

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

97615920 is a wasteful number, since it uses less digits than its factorization.

97615920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21442 (or 21436 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 97615920 is about 9880.0769227775. The cubic root of 97615920 is about 460.4405357522.

The spelling of 97615920 in words is "ninety-seven million, six hundred fifteen thousand, nine hundred twenty".