289385020 has 12 divisors (see below), whose sum is σ = 607708584. Its totient is φ = 115754000.

The previous prime is 289385009. The next prime is 289385039. The reversal of 289385020 is 20583982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7234606 + ... + 7234645.

It is an arithmetic number, because the mean of its divisors is an integer number (50642382).

Almost surely, 2^289385020 is an apocalyptic number.

289385020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289385020 is an abundant number, since it is smaller than the sum of its proper divisors (318323564).

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

289385020 is a wasteful number, since it uses less digits than its factorization.

289385020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14469260 (or 14469258 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 289385020 is about 17011.3203485209. The cubic root of 289385020 is about 661.4423765747.

The spelling of 289385020 in words is "two hundred eighty-nine million, three hundred eighty-five thousand, twenty".