289402520 has 64 divisors (see below), whose sum is σ = 716083200. Its totient is φ = 104388480.

The previous prime is 289402489. The next prime is 289402549. The reversal of 289402520 is 25204982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53291 + ... + 58469.

It is an arithmetic number, because the mean of its divisors is an integer number (11188800).

Almost surely, 2^289402520 is an apocalyptic number.

289402520 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 289402520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358041600).

289402520 is an abundant number, since it is smaller than the sum of its proper divisors (426680680).

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

289402520 is a wasteful number, since it uses less digits than its factorization.

289402520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328 (or 5324 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 289402520 is about 17011.8347041111. The cubic root of 289402520 is about 661.4557094559.

The spelling of 289402520 in words is "two hundred eighty-nine million, four hundred two thousand, five hundred twenty".