82931778 has 48 divisors (see below), whose sum is σ = 185739840. Its totient is φ = 26726112.

The previous prime is 82931759. The next prime is 82931791. The reversal of 82931778 is 87713928.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 23 ways as a sum of consecutive naturals, for example, 83875 + ... + 84857.

It is an arithmetic number, because the mean of its divisors is an integer number (3869580).

Almost surely, 2^82931778 is an apocalyptic number.

82931778 is an abundant number, since it is smaller than the sum of its proper divisors (102808062).

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

82931778 is a wasteful number, since it uses less digits than its factorization.

82931778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143 (or 1140 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 82931778 is about 9106.6886407739. The cubic root of 82931778 is about 436.0875206566.

The spelling of 82931778 in words is "eighty-two million, nine hundred thirty-one thousand, seven hundred seventy-eight".