17989172 has 6 divisors (see below), whose sum is σ = 31481058. Its totient is φ = 8994584.

The previous prime is 17989133. The next prime is 17989177. The reversal of 17989172 is 27198971.

It can be written as a sum of positive squares in only one way, i.e., 17355556 + 633616 = 4166^2 + 796^2 .

It is a super-2 number, since 2×17989172² = 647220618491168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17989177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2248643 + ... + 2248650.

It is an arithmetic number, because the mean of its divisors is an integer number (5246843).

Almost surely, 2^17989172 is an apocalyptic number.

It is an amenable number.

17989172 is a deficient number, since it is larger than the sum of its proper divisors (13491886).

17989172 is a wasteful number, since it uses less digits than its factorization.

17989172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497297 (or 4497295 counting only the distinct ones).

The product of its digits is 63504, while the sum is 44.

The square root of 17989172 is about 4241.3644031137. The cubic root of 17989172 is about 262.0215781618.

The spelling of 17989172 in words is "seventeen million, nine hundred eighty-nine thousand, one hundred seventy-two".