86391216 has 30 divisors (see below), whose sum is σ = 241775820. Its totient is φ = 28797024.

The previous prime is 86391211. The next prime is 86391251. The reversal of 86391216 is 61219368.

86391216 is a `hidden beast` number, since 8 + 639 + 1 + 2 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 (86391211) 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, 299826 + ... + 300113.

It is an arithmetic number, because the mean of its divisors is an integer number (8059194).

Almost surely, 2^86391216 is an apocalyptic number.

It is an amenable number.

86391216 is an abundant number, since it is smaller than the sum of its proper divisors (155384604).

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

86391216 is a wasteful number, since it uses less digits than its factorization.

86391216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599953 (or 599944 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 86391216 is about 9294.6875149195. The cubic root of 86391216 is about 442.0687976010.

The spelling of 86391216 in words is "eighty-six million, three hundred ninety-one thousand, two hundred sixteen".