82978872 has 16 divisors (see below), whose sum is σ = 207447240. Its totient is φ = 27659616.

The previous prime is 82978823. The next prime is 82978891. The reversal of 82978872 is 27887928.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728703 + ... + 1728750.

Almost surely, 2^82978872 is an apocalyptic number.

It is an amenable number.

82978872 is an abundant number, since it is smaller than the sum of its proper divisors (124468368).

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

82978872 is a wasteful number, since it uses less digits than its factorization.

82978872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457462 (or 3457458 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 82978872 is about 9109.2739557003. The cubic root of 82978872 is about 436.1700512217.

The spelling of 82978872 in words is "eighty-two million, nine hundred seventy-eight thousand, eight hundred seventy-two".