82491728 has 20 divisors (see below), whose sum is σ = 174357888. Its totient is φ = 37496160.

The previous prime is 82491719. The next prime is 82491733. The reversal of 82491728 is 82719428.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234176 + ... + 234527.

Almost surely, 2^82491728 is an apocalyptic number.

82491728 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

82491728 is an abundant number, since it is smaller than the sum of its proper divisors (91866160).

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

82491728 is a wasteful number, since it uses less digits than its factorization.

82491728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468722 (or 468716 counting only the distinct ones).

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

The square root of 82491728 is about 9082.4956922643. The cubic root of 82491728 is about 435.3148343969.

The spelling of 82491728 in words is "eighty-two million, four hundred ninety-one thousand, seven hundred twenty-eight".