992428857 has 24 divisors (see below), whose sum is σ = 1662754496. Its totient is φ = 558635616.

The previous prime is 992428849. The next prime is 992428867. The reversal of 992428857 is 758824299.

It is not a de Polignac number, because 992428857 - 2³ = 992428849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (992428867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113338 + ... + 121779.

Almost surely, 2^992428857 is an apocalyptic number.

It is an amenable number.

992428857 is a deficient number, since it is larger than the sum of its proper divisors (670325639).

992428857 is a wasteful number, since it uses less digits than its factorization.

992428857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235197 (or 235194 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 992428857 is about 31502.8388720763. The cubic root of 992428857 is about 997.4698896069.

It can be divided in two parts, 9924 and 28857, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 992428857 in words is "nine hundred ninety-two million, four hundred twenty-eight thousand, eight hundred fifty-seven".