97774728 has 32 divisors (see below), whose sum is σ = 244685760. Its totient is φ = 32558400.

The previous prime is 97774723. The next prime is 97774753. The reversal of 97774728 is 82747779.

It is not an unprimeable number, because it can be changed into a prime (97774723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37053 + ... + 39603.

It is an arithmetic number, because the mean of its divisors is an integer number (7646430).

Almost surely, 2^97774728 is an apocalyptic number.

It is an amenable number.

97774728 is an abundant number, since it is smaller than the sum of its proper divisors (146911032).

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

97774728 is a wasteful number, since it uses less digits than its factorization.

97774728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157 (or 4153 counting only the distinct ones).

The product of its digits is 1382976, while the sum is 51.

The square root of 97774728 is about 9888.1104362765. The cubic root of 97774728 is about 460.6900921202.

The spelling of 97774728 in words is "ninety-seven million, seven hundred seventy-four thousand, seven hundred twenty-eight".