82199878 has 16 divisors (see below), whose sum is σ = 124444224. Its totient is φ = 40720680.

The previous prime is 82199869. The next prime is 82199893. The reversal of 82199878 is 87899128.

It is a congruent number.

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, 150001 + ... + 150547.

It is an arithmetic number, because the mean of its divisors is an integer number (7777764).

Almost surely, 2^82199878 is an apocalyptic number.

82199878 is a deficient number, since it is larger than the sum of its proper divisors (42244346).

82199878 is a wasteful number, since it uses less digits than its factorization.

82199878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107.

The product of its digits is 580608, while the sum is 52.

The square root of 82199878 is about 9066.4148371890. The cubic root of 82199878 is about 434.8008565712.

The spelling of 82199878 in words is "eighty-two million, one hundred ninety-nine thousand, eight hundred seventy-eight".