289089138 has 32 divisors (see below), whose sum is σ = 631435392. Its totient is φ = 87696000.

The previous prime is 289089137. The next prime is 289089149. The reversal of 289089138 is 831980982.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (289089133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20563 + ... + 31638.

It is an arithmetic number, because the mean of its divisors is an integer number (19732356).

Almost surely, 2^289089138 is an apocalyptic number.

289089138 is an abundant number, since it is smaller than the sum of its proper divisors (342346254).

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

289089138 is a wasteful number, since it uses less digits than its factorization.

289089138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52290.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 289089138 is about 17002.6215037564. The cubic root of 289089138 is about 661.2168688963.

The spelling of 289089138 in words is "two hundred eighty-nine million, eighty-nine thousand, one hundred thirty-eight".