97155728 has 10 divisors (see below), whose sum is σ = 188239254. Its totient is φ = 48577856.

The previous prime is 97155727. The next prime is 97155739. The reversal of 97155728 is 82755179.

It can be written as a sum of positive squares in only one way, i.e., 94633984 + 2521744 = 9728^2 + 1588^2 .

It is not an unprimeable number, because it can be changed into a prime (97155727) 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 as a sum of consecutive naturals, namely, 3036101 + ... + 3036132.

Almost surely, 2^97155728 is an apocalyptic number.

It is an amenable number.

97155728 is a deficient number, since it is larger than the sum of its proper divisors (91083526).

97155728 is a wasteful number, since it uses less digits than its factorization.

97155728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072241 (or 6072235 counting only the distinct ones).

The product of its digits is 176400, while the sum is 44.

The square root of 97155728 is about 9856.7605226058. The cubic root of 97155728 is about 459.7158421454.

The spelling of 97155728 in words is "ninety-seven million, one hundred fifty-five thousand, seven hundred twenty-eight".