17997144 has 32 divisors (see below), whose sum is σ = 49083840. Its totient is φ = 5453600.

The previous prime is 17997137. The next prime is 17997163. The reversal of 17997144 is 44179971.

It is a junction number, because it is equal to n+sod(n) for n = 17997096 and 17997105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33822 + ... + 34349.

It is an arithmetic number, because the mean of its divisors is an integer number (1533870).

Almost surely, 2^17997144 is an apocalyptic number.

It is an amenable number.

17997144 is an abundant number, since it is smaller than the sum of its proper divisors (31086696).

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

17997144 is a wasteful number, since it uses less digits than its factorization.

17997144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68191 (or 68187 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 17997144 is about 4242.3040909393. The cubic root of 17997144 is about 262.0602778777.

The spelling of 17997144 in words is "seventeen million, nine hundred ninety-seven thousand, one hundred forty-four".