82428731 has 20 divisors (see below), whose sum is σ = 104936664. Its totient is φ = 64209600.

The previous prime is 82428719. The next prime is 82428763. The reversal of 82428731 is 13782428.

It is not a de Polignac number, because 82428731 - 2²² = 78234427 is a prime.

It is a super-2 number, since 2×82428731² = 13588991388540722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82428691 and 82428700.

It is not an unprimeable number, because it can be changed into a prime (82428431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24851 + ... + 27971.

Almost surely, 2^82428731 is an apocalyptic number.

82428731 is a deficient number, since it is larger than the sum of its proper divisors (22507933).

82428731 is an equidigital number, since it uses as much as digits as its factorization.

82428731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160 (or 3139 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 82428731 is about 9079.0269853107. The cubic root of 82428731 is about 435.2039929297.

The spelling of 82428731 in words is "eighty-two million, four hundred twenty-eight thousand, seven hundred thirty-one".