82138782 has 32 divisors (see below), whose sum is σ = 179544960. Its totient is φ = 24844320.

The previous prime is 82138733. The next prime is 82138787. The reversal of 82138782 is 28783128.

It is a self number, because there is not a number n which added to its sum of digits gives 82138782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82138787) 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, 55569 + ... + 57027.

It is an arithmetic number, because the mean of its divisors is an integer number (5610780).

Almost surely, 2^82138782 is an apocalyptic number.

82138782 is an abundant number, since it is smaller than the sum of its proper divisors (97406178).

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

82138782 is a wasteful number, since it uses less digits than its factorization.

82138782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328.

The product of its digits is 43008, while the sum is 39.

The square root of 82138782 is about 9063.0448525868. The cubic root of 82138782 is about 434.6931063005.

The spelling of 82138782 in words is "eighty-two million, one hundred thirty-eight thousand, seven hundred eighty-two".