86641992 has 24 divisors (see below), whose sum is σ = 234655590. Its totient is φ = 28880640.

The previous prime is 86641991. The next prime is 86642011. The reversal of 86641992 is 29914668.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 85488516 + 1153476 = 9246^2 + 1074^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (86641991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 601609 + ... + 601752.

Almost surely, 2^86641992 is an apocalyptic number.

It is an amenable number.

86641992 is an abundant number, since it is smaller than the sum of its proper divisors (148013598).

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

86641992 is a wasteful number, since it uses less digits than its factorization.

86641992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203373 (or 1203366 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 86641992 is about 9308.1680259866. The cubic root of 86641992 is about 442.4961294309.

The spelling of 86641992 in words is "eighty-six million, six hundred forty-one thousand, nine hundred ninety-two".