97728678 has 24 divisors (see below), whose sum is σ = 218577216. Its totient is φ = 31525200.

The previous prime is 97728643. The next prime is 97728689. The reversal of 97728678 is 87682779.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87013 + ... + 88128.

It is an arithmetic number, because the mean of its divisors is an integer number (9107384).

Almost surely, 2^97728678 is an apocalyptic number.

97728678 is an abundant number, since it is smaller than the sum of its proper divisors (120848538).

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

97728678 is a wasteful number, since it uses less digits than its factorization.

97728678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175180 (or 175177 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 97728678 is about 9885.7816079458. The cubic root of 97728678 is about 460.6177553974.

The spelling of 97728678 in words is "ninety-seven million, seven hundred twenty-eight thousand, six hundred seventy-eight".