82055780 has 24 divisors (see below), whose sum is σ = 173638080. Its totient is φ = 32570720.

The previous prime is 82055773. The next prime is 82055863. The reversal of 82055780 is 8755028.

It is a self number, because there is not a number n which added to its sum of digits gives 82055780.

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, 13040 + ... + 18279.

It is an arithmetic number, because the mean of its divisors is an integer number (7234920).

Almost surely, 2^82055780 is an apocalyptic number.

It is an amenable number.

82055780 is an abundant number, since it is smaller than the sum of its proper divisors (91582300).

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

82055780 is a wasteful number, since it uses less digits than its factorization.

82055780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31459 (or 31457 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 82055780 is about 9058.4645498009. The cubic root of 82055780 is about 434.5466364830.

The spelling of 82055780 in words is "eighty-two million, fifty-five thousand, seven hundred eighty".