289890 has 24 divisors (see below), whose sum is σ = 753948. Its totient is φ = 77280.

The previous prime is 289889. The next prime is 289897. The reversal of 289890 is 98982.

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 1521 = 537^2 + 39^2 .

It is not an unprimeable number, because it can be changed into a prime (289897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1521 + ... + 1700.

2²⁸⁹⁸⁹⁰ is an apocalyptic number.

289890 is an abundant number, since it is smaller than the sum of its proper divisors (464058).

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

289890 is a wasteful number, since it uses less digits than its factorization.

289890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234 (or 3231 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 289890 is about 538.4143385906. The cubic root of 289890 is about 66.1826894374.

The spelling of 289890 in words is "two hundred eighty-nine thousand, eight hundred ninety".