17989245 has 12 divisors (see below), whose sum is σ = 31181436. Its totient is φ = 9594240.

The previous prime is 17989177. The next prime is 17989253. The reversal of 17989245 is 54298971.

It can be written as a sum of positive squares in 2 ways, for example, as 13439556 + 4549689 = 3666^2 + 2133^2 .

It is not a de Polignac number, because 17989245 - 2⁷ = 17989117 is a prime.

It is a super-2 number, since 2×17989245² = 647225871340050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 399761 = 17989245 / (1 + 7 + 9 + 8 + 9 + 2 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 17989245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199836 + ... + 199925.

It is an arithmetic number, because the mean of its divisors is an integer number (2598453).

Almost surely, 2^17989245 is an apocalyptic number.

17989245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17989245 is a deficient number, since it is larger than the sum of its proper divisors (13192191).

17989245 is a wasteful number, since it uses less digits than its factorization.

17989245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399772 (or 399769 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 17989245 is about 4241.3730088263. The cubic root of 17989245 is about 262.0219325889.

The spelling of 17989245 in words is "seventeen million, nine hundred eighty-nine thousand, two hundred forty-five".