97857792 has 54 divisors (see below), whose sum is σ = 282154782. Its totient is φ = 32618496.

The previous prime is 97857779. The next prime is 97857811. The reversal of 97857792 is 29775879.

It can be written as a sum of positive squares in only one way, i.e., 68956416 + 28901376 = 8304^2 + 5376^2 .

It is a super-2 number, since 2×97857792² = 19152294910230528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18933 + ... + 23540.

Almost surely, 2^97857792 is an apocalyptic number.

It is an amenable number.

97857792 is an abundant number, since it is smaller than the sum of its proper divisors (184296990).

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

97857792 is a wasteful number, since it uses less digits than its factorization.

97857792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42495 (or 42478 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 97857792 is about 9892.3097403994. The cubic root of 97857792 is about 460.8205141330.

The spelling of 97857792 in words is "ninety-seven million, eight hundred fifty-seven thousand, seven hundred ninety-two".