818465172 has 24 divisors (see below), whose sum is σ = 2182574016. Its totient is φ = 233847168.

The previous prime is 818465171. The next prime is 818465183. The reversal of 818465172 is 271564818.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818465171) 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, 4871733 + ... + 4871900.

It is an arithmetic number, because the mean of its divisors is an integer number (90940584).

Almost surely, 2^818465172 is an apocalyptic number.

It is an amenable number.

818465172 is an abundant number, since it is smaller than the sum of its proper divisors (1364108844).

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

818465172 is a wasteful number, since it uses less digits than its factorization.

818465172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9743647 (or 9743645 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 818465172 is about 28608.8303151317. The cubic root of 818465172 is about 935.4058203846.

The spelling of 818465172 in words is "eight hundred eighteen million, four hundred sixty-five thousand, one hundred seventy-two".