82680394 has 8 divisors (see below), whose sum is σ = 124340580. Its totient is φ = 41233536.

The previous prime is 82680391. The next prime is 82680407. The reversal of 82680394 is 49308628.

It can be written as a sum of positive squares in 2 ways, for example, as 62204769 + 20475625 = 7887^2 + 4525^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (82680391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52359 + ... + 53914.

Almost surely, 2^82680394 is an apocalyptic number.

82680394 is a deficient number, since it is larger than the sum of its proper divisors (41660186).

82680394 is a wasteful number, since it uses less digits than its factorization.

82680394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106664.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 82680394 is about 9092.8760026737. The cubic root of 82680394 is about 435.6464497712.

The spelling of 82680394 in words is "eighty-two million, six hundred eighty thousand, three hundred ninety-four".