82778052 has 36 divisors (see below), whose sum is σ = 224684880. Its totient is φ = 23650704.

The previous prime is 82778051. The next prime is 82778077. The reversal of 82778052 is 25087728.

It is a self number, because there is not a number n which added to its sum of digits gives 82778052.

It is not an unprimeable number, because it can be changed into a prime (82778051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69802 + ... + 70977.

Almost surely, 2^82778052 is an apocalyptic number.

It is an amenable number.

82778052 is an abundant number, since it is smaller than the sum of its proper divisors (141906828).

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

82778052 is a wasteful number, since it uses less digits than its factorization.

82778052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140800 (or 140791 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 82778052 is about 9098.2444460456. The cubic root of 82778052 is about 435.8179036451.

The spelling of 82778052 in words is "eighty-two million, seven hundred seventy-eight thousand, fifty-two".