82884978 has 32 divisors (see below), whose sum is σ = 200934720. Its totient is φ = 25116480.

The previous prime is 82884959. The next prime is 82885007. The reversal of 82884978 is 87948828.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69175 + ... + 70362.

It is an arithmetic number, because the mean of its divisors is an integer number (6279210).

Almost surely, 2^82884978 is an apocalyptic number.

82884978 is an abundant number, since it is smaller than the sum of its proper divisors (118049742).

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

82884978 is a wasteful number, since it uses less digits than its factorization.

82884978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139559 (or 139553 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 82884978 is about 9104.1187382415. The cubic root of 82884978 is about 436.0054743582.

The spelling of 82884978 in words is "eighty-two million, eight hundred eighty-four thousand, nine hundred seventy-eight".