97891388 has 24 divisors (see below), whose sum is σ = 196030464. Its totient is φ = 41900400.

The previous prime is 97891379. The next prime is 97891403. The reversal of 97891388 is 88319879.

It is a congruent number.

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, 27173 + ... + 30563.

It is an arithmetic number, because the mean of its divisors is an integer number (8167936).

Almost surely, 2^97891388 is an apocalyptic number.

It is an amenable number.

97891388 is an abundant number, since it is smaller than the sum of its proper divisors (98139076).

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

97891388 is a wasteful number, since it uses less digits than its factorization.

97891388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433 (or 4431 counting only the distinct ones).

The product of its digits is 870912, while the sum is 53.

The square root of 97891388 is about 9894.0076814201. The cubic root of 97891388 is about 460.8732435557.

The spelling of 97891388 in words is "ninety-seven million, eight hundred ninety-one thousand, three hundred eighty-eight".