82439786 has 32 divisors (see below), whose sum is σ = 148393728. Its totient is φ = 33848640.

The previous prime is 82439759. The next prime is 82439789. The reversal of 82439786 is 68793428.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 82439786.

It is not an unprimeable number, because it can be changed into a prime (82439789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10376 + ... + 16508.

It is an arithmetic number, because the mean of its divisors is an integer number (4637304).

Almost surely, 2^82439786 is an apocalyptic number.

82439786 is a deficient number, since it is larger than the sum of its proper divisors (65953942).

82439786 is a wasteful number, since it uses less digits than its factorization.

82439786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6206.

The product of its digits is 580608, while the sum is 47.

The square root of 82439786 is about 9079.6357856469. The cubic root of 82439786 is about 435.2234479790.

The spelling of 82439786 in words is "eighty-two million, four hundred thirty-nine thousand, seven hundred eighty-six".