82856840 has 32 divisors (see below), whose sum is σ = 203376960. Its totient is φ = 30129600.

The previous prime is 82856819. The next prime is 82856843. The reversal of 82856840 is 4865828.

It is not an unprimeable number, because it can be changed into a prime (82856843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93716 + ... + 94595.

It is an arithmetic number, because the mean of its divisors is an integer number (6355530).

Almost surely, 2^82856840 is an apocalyptic number.

It is an amenable number.

82856840 is an abundant number, since it is smaller than the sum of its proper divisors (120520120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82856840 is a wasteful number, since it uses less digits than its factorization.

82856840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188333 (or 188329 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 82856840 is about 9102.5732625450. The cubic root of 82856840 is about 435.9561300303.

The spelling of 82856840 in words is "eighty-two million, eight hundred fifty-six thousand, eight hundred forty".