86172822 has 40 divisors (see below), whose sum is σ = 194083032. Its totient is φ = 28576800.

The previous prime is 86172799. The next prime is 86172829. The reversal of 86172822 is 22827168.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172829) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32922 + ... + 35442.

Almost surely, 2^86172822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86172822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97041516).

86172822 is an abundant number, since it is smaller than the sum of its proper divisors (107910210).

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

86172822 is a wasteful number, since it uses less digits than its factorization.

86172822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 2737 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 86172822 is about 9282.9317567243. The cubic root of 86172822 is about 441.6959717275.

The spelling of 86172822 in words is "eighty-six million, one hundred seventy-two thousand, eight hundred twenty-two".