17989542 has 48 divisors (see below), whose sum is σ = 42831360. Its totient is φ = 5431536.

The previous prime is 17989507. The next prime is 17989549. The reversal of 17989542 is 24598971.

17989542 is a `hidden beast` number, since 17 + 98 + 9 + 542 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17989549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6723 + ... + 9009.

It is an arithmetic number, because the mean of its divisors is an integer number (892320).

Almost surely, 2^17989542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17989542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21415680).

17989542 is an abundant number, since it is smaller than the sum of its proper divisors (24841818).

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

17989542 is a wasteful number, since it uses less digits than its factorization.

17989542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2334 counting only the distinct ones).

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

The square root of 17989542 is about 4241.4080209289. The cubic root of 17989542 is about 262.0233745632.

The spelling of 17989542 in words is "seventeen million, nine hundred eighty-nine thousand, five hundred forty-two".