289560 has 64 divisors (see below), whose sum is σ = 921600. Its totient is φ = 72576.

The previous prime is 289559. The next prime is 289573. The reversal of 289560 is 65982.

289560 = T₁₆₅ + T₁₆₆ + ... + T₁₈₃.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2217 + ... + 2343.

It is an arithmetic number, because the mean of its divisors is an integer number (14400).

2²⁸⁹⁵⁶⁰ is an apocalyptic number.

289560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460800).

289560 is an abundant number, since it is smaller than the sum of its proper divisors (632040).

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

289560 is a wasteful number, since it uses less digits than its factorization.

289560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 289560 is about 538.1077958922. The cubic root of 289560 is about 66.1575665975.

The spelling of 289560 in words is "two hundred eighty-nine thousand, five hundred sixty".