82791428 has 12 divisors (see below), whose sum is σ = 153407772. Its totient is φ = 38960640.

The previous prime is 82791409. The next prime is 82791437. The reversal of 82791428 is 82419728.

82791428 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 72046144 + 10745284 = 8488^2 + 3278^2 .

82791428 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608693 + ... + 608828.

It is an arithmetic number, because the mean of its divisors is an integer number (12783981).

Almost surely, 2^82791428 is an apocalyptic number.

It is an amenable number.

82791428 is a deficient number, since it is larger than the sum of its proper divisors (70616344).

82791428 is a wasteful number, since it uses less digits than its factorization.

82791428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217542 (or 1217540 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 82791428 is about 9098.9795032190. The cubic root of 82791428 is about 435.8413768008.

The spelling of 82791428 in words is "eighty-two million, seven hundred ninety-one thousand, four hundred twenty-eight".