97700728 has 32 divisors (see below), whose sum is σ = 186631200. Its totient is φ = 47941632.

The previous prime is 97700699. The next prime is 97700741. The reversal of 97700728 is 82700779.

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, 105853 + ... + 106771.

It is an arithmetic number, because the mean of its divisors is an integer number (5832225).

Almost surely, 2^97700728 is an apocalyptic number.

It is an amenable number.

97700728 is a deficient number, since it is larger than the sum of its proper divisors (88930472).

97700728 is a wasteful number, since it uses less digits than its factorization.

97700728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 97700728 is about 9884.3678604147. The cubic root of 97700728 is about 460.5738396160.

The spelling of 97700728 in words is "ninety-seven million, seven hundred thousand, seven hundred twenty-eight".