289988 has 6 divisors (see below), whose sum is σ = 507486. Its totient is φ = 144992.

The previous prime is 289987. The next prime is 289999. The reversal of 289988 is 889982.

It can be written as a sum of positive squares in only one way, i.e., 228484 + 61504 = 478^2 + 248^2 .

It is not an unprimeable number, because it can be changed into a prime (289987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36245 + ... + 36252.

It is an arithmetic number, because the mean of its divisors is an integer number (84581).

2²⁸⁹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

289988 is a deficient number, since it is larger than the sum of its proper divisors (217498).

289988 is a wasteful number, since it uses less digits than its factorization.

289988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72501 (or 72499 counting only the distinct ones).

The product of its digits is 82944, while the sum is 44.

The square root of 289988 is about 538.5053388779. The cubic root of 289988 is about 66.1901464875.

The spelling of 289988 in words is "two hundred eighty-nine thousand, nine hundred eighty-eight".