16909172 has 12 divisors (see below), whose sum is σ = 33818400. Its totient is φ = 7246776.

The previous prime is 16909133. The next prime is 16909181. The reversal of 16909172 is 27190961.

16909172 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301922 + ... + 301977.

It is an arithmetic number, because the mean of its divisors is an integer number (2818200).

Almost surely, 2^16909172 is an apocalyptic number.

It is an amenable number.

16909172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16909172 is a wasteful number, since it uses less digits than its factorization.

16909172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603910 (or 603908 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 16909172 is about 4112.0763611587. The cubic root of 16909172 is about 256.6694109637.

The spelling of 16909172 in words is "sixteen million, nine hundred nine thousand, one hundred seventy-two".