97565988 has 48 divisors (see below), whose sum is σ = 258077120. Its totient is φ = 28439424.

The previous prime is 97565927. The next prime is 97565989. The reversal of 97565988 is 88956579.

It is a super-2 number, since 2×97565988² = 19038244028832288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (97565989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13495 + ... + 19422.

Almost surely, 2^97565988 is an apocalyptic number.

It is an amenable number.

97565988 is an abundant number, since it is smaller than the sum of its proper divisors (160511132).

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

97565988 is a wasteful number, since it uses less digits than its factorization.

97565988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32956 (or 32954 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 57.

The square root of 97565988 is about 9877.5496961544. The cubic root of 97565988 is about 460.3620149604.

The spelling of 97565988 in words is "ninety-seven million, five hundred sixty-five thousand, nine hundred eighty-eight".