17172972 has 30 divisors (see below), whose sum is σ = 44894388. Its totient is φ = 5724216.

The previous prime is 17172943. The next prime is 17173021. The reversal of 17172972 is 27927171.

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

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 26178 + ... + 26825.

Almost surely, 2^17172972 is an apocalyptic number.

17172972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

17172972 is an abundant number, since it is smaller than the sum of its proper divisors (27721416).

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

17172972 is a wasteful number, since it uses less digits than its factorization.

17172972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53019 (or 53008 counting only the distinct ones).

The product of its digits is 12348, while the sum is 36.

The square root of 17172972 is about 4144.0284748056. The cubic root of 17172972 is about 257.9972958072.

The spelling of 17172972 in words is "seventeen million, one hundred seventy-two thousand, nine hundred seventy-two".