97861638 has 32 divisors (see below), whose sum is σ = 227909376. Its totient is φ = 27432288.

The previous prime is 97861613. The next prime is 97861649. The reversal of 97861638 is 83616879.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19756 + ... + 24207.

It is an arithmetic number, because the mean of its divisors is an integer number (7122168).

Almost surely, 2^97861638 is an apocalyptic number.

97861638 is an abundant number, since it is smaller than the sum of its proper divisors (130047738).

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

97861638 is a wasteful number, since it uses less digits than its factorization.

97861638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44028.

The product of its digits is 435456, while the sum is 48.

The square root of 97861638 is about 9892.5041319173. The cubic root of 97861638 is about 460.8265510990.

The spelling of 97861638 in words is "ninety-seven million, eight hundred sixty-one thousand, six hundred thirty-eight".