82857688 has 8 divisors (see below), whose sum is σ = 155358180. Its totient is φ = 41428840.

The previous prime is 82857667. The next prime is 82857713. The reversal of 82857688 is 88675828.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5178598 + ... + 5178613.

Almost surely, 2^82857688 is an apocalyptic number.

It is an amenable number.

82857688 is a deficient number, since it is larger than the sum of its proper divisors (72500492).

82857688 is a wasteful number, since it uses less digits than its factorization.

82857688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10357217 (or 10357213 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 52.

The square root of 82857688 is about 9102.6198426607. The cubic root of 82857688 is about 435.9576172925.

The spelling of 82857688 in words is "eighty-two million, eight hundred fifty-seven thousand, six hundred eighty-eight".