86199920 has 20 divisors (see below), whose sum is σ = 200415000. Its totient is φ = 34479936.

The previous prime is 86199913. The next prime is 86199931. The reversal of 86199920 is 2999168.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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, 538670 + ... + 538829.

It is an arithmetic number, because the mean of its divisors is an integer number (10020750).

Almost surely, 2^86199920 is an apocalyptic number.

86199920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86199920 is an abundant number, since it is smaller than the sum of its proper divisors (114215080).

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

86199920 is a wasteful number, since it uses less digits than its factorization.

86199920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077512 (or 1077506 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 86199920 is about 9284.3912024429. The cubic root of 86199920 is about 441.7422656083.

The spelling of 86199920 in words is "eighty-six million, one hundred ninety-nine thousand, nine hundred twenty".