82121796 has 48 divisors (see below), whose sum is σ = 218673280. Its totient is φ = 26632800.

The previous prime is 82121783. The next prime is 82121807. The reversal of 82121796 is 69712128.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 82121796.

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, 6280 + ... + 14271.

Almost surely, 2^82121796 is an apocalyptic number.

It is an amenable number.

82121796 is an abundant number, since it is smaller than the sum of its proper divisors (136551484).

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

82121796 is a wasteful number, since it uses less digits than its factorization.

82121796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20601 (or 20593 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 82121796 is about 9062.1077018539. The cubic root of 82121796 is about 434.6631399194.

The spelling of 82121796 in words is "eighty-two million, one hundred twenty-one thousand, seven hundred ninety-six".