180431172 has 24 divisors (see below), whose sum is σ = 467784800. Its totient is φ = 60143688.

The previous prime is 180431171. The next prime is 180431179. The reversal of 180431172 is 271134081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (180431171) 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, 835222 + ... + 835437.

Almost surely, 2^180431172 is an apocalyptic number.

180431172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

180431172 is an abundant number, since it is smaller than the sum of its proper divisors (287353628).

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

180431172 is a wasteful number, since it uses less digits than its factorization.

180431172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670672 (or 1670664 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 180431172 is about 13432.4670853868. The cubic root of 180431172 is about 565.0720893737.

The spelling of 180431172 in words is "one hundred eighty million, four hundred thirty-one thousand, one hundred seventy-two".