82778982 has 32 divisors (see below), whose sum is σ = 194503680. Its totient is φ = 23154720.

The previous prime is 82778977. The next prime is 82779023. The reversal of 82778982 is 28987728.

It is a happy number.

It is a congruent 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, 47382 + ... + 49097.

It is an arithmetic number, because the mean of its divisors is an integer number (6078240).

Almost surely, 2^82778982 is an apocalyptic number.

82778982 is an abundant number, since it is smaller than the sum of its proper divisors (111724698).

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

82778982 is a wasteful number, since it uses less digits than its factorization.

82778982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96508.

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

The square root of 82778982 is about 9098.2955546630. The cubic root of 82778982 is about 435.8195357570.

The spelling of 82778982 in words is "eighty-two million, seven hundred seventy-eight thousand, nine hundred eighty-two".