82975920 has 40 divisors (see below), whose sum is σ = 257226096. Its totient is φ = 22126848.

The previous prime is 82975909. The next prime is 82975951. The reversal of 82975920 is 2957928.

It is a tau number, because it is divible by the number of its divisors (40).

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, 172627 + ... + 173106.

Almost surely, 2^82975920 is an apocalyptic number.

82975920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82975920 is an abundant number, since it is smaller than the sum of its proper divisors (174250176).

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

82975920 is a wasteful number, since it uses less digits than its factorization.

82975920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345749 (or 345743 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 82975920 is about 9109.1119215871. Note that the first 3 decimals coincide. The cubic root of 82975920 is about 436.1648788638.

The spelling of 82975920 in words is "eighty-two million, nine hundred seventy-five thousand, nine hundred twenty".