86856020 has 24 divisors (see below), whose sum is σ = 187328904. Its totient is φ = 33803136.

The previous prime is 86855987. The next prime is 86856023. The reversal of 86856020 is 2065868.

It can be written as a sum of positive squares in 4 ways, for example, as 27164944 + 59691076 = 5212^2 + 7726^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86856023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57947 + ... + 59426.

It is an arithmetic number, because the mean of its divisors is an integer number (7805371).

Almost surely, 2^86856020 is an apocalyptic number.

It is an amenable number.

86856020 is an abundant number, since it is smaller than the sum of its proper divisors (100472884).

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

86856020 is a wasteful number, since it uses less digits than its factorization.

86856020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117419 (or 117417 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 86856020 is about 9319.6577190367. The cubic root of 86856020 is about 442.8601895633.

The spelling of 86856020 in words is "eighty-six million, eight hundred fifty-six thousand, twenty".