82905686 has 8 divisors (see below), whose sum is σ = 125193600. Its totient is φ = 41174488.

The previous prime is 82905661. The next prime is 82905709. The reversal of 82905686 is 68650928.

It is a happy number.

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

It is a super-2 number, since 2×82905686² = 13746705542261192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138806 + ... + 139401.

It is an arithmetic number, because the mean of its divisors is an integer number (15649200).

Almost surely, 2^82905686 is an apocalyptic number.

82905686 is a deficient number, since it is larger than the sum of its proper divisors (42287914).

82905686 is a wasteful number, since it uses less digits than its factorization.

82905686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278358.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 82905686 is about 9105.2559546671. The cubic root of 82905686 is about 436.0417819006.

The spelling of 82905686 in words is "eighty-two million, nine hundred five thousand, six hundred eighty-six".