82680784 has 10 divisors (see below), whose sum is σ = 160194050. Its totient is φ = 41340384.

The previous prime is 82680779. The next prime is 82680817. The reversal of 82680784 is 48708628.

It can be written as a sum of positive squares in only one way, i.e., 56670784 + 26010000 = 7528^2 + 5100^2 .

It is a super-2 number, since 2×82680784² = 13672224085709312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82680784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583759 + ... + 2583790.

It is an arithmetic number, because the mean of its divisors is an integer number (16019405).

Almost surely, 2^82680784 is an apocalyptic number.

It is an amenable number.

82680784 is a deficient number, since it is larger than the sum of its proper divisors (77513266).

82680784 is a wasteful number, since it uses less digits than its factorization.

82680784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167557 (or 5167551 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 82680784 is about 9092.8974480085. The cubic root of 82680784 is about 435.6471347456.

The spelling of 82680784 in words is "eighty-two million, six hundred eighty thousand, seven hundred eighty-four".