82779242 has 48 divisors (see below), whose sum is σ = 156530880. Its totient is φ = 32138496.

The previous prime is 82779241. The next prime is 82779247. The reversal of 82779242 is 24297728.

It is a self number, because there is not a number n which added to its sum of digits gives 82779242.

It is not an unprimeable number, because it can be changed into a prime (82779241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139298 + ... + 139890.

It is an arithmetic number, because the mean of its divisors is an integer number (3261060).

Almost surely, 2^82779242 is an apocalyptic number.

82779242 is a deficient number, since it is larger than the sum of its proper divisors (73751638).

82779242 is a wasteful number, since it uses less digits than its factorization.

82779242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 674 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 82779242 is about 9098.3098430423. The cubic root of 82779242 is about 435.8199920442.

The spelling of 82779242 in words is "eighty-two million, seven hundred seventy-nine thousand, two hundred forty-two".