289281020 has 24 divisors (see below), whose sum is σ = 694274784. Its totient is φ = 99182016.

The previous prime is 289281019. The next prime is 289281043. The reversal of 289281020 is 20182982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033007 + ... + 1033286.

It is an arithmetic number, because the mean of its divisors is an integer number (28928116).

Almost surely, 2^289281020 is an apocalyptic number.

289281020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289281020 is an abundant number, since it is smaller than the sum of its proper divisors (404993764).

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

289281020 is a wasteful number, since it uses less digits than its factorization.

289281020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066309 (or 2066307 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 289281020 is about 17008.2632858267. The cubic root of 289281020 is about 661.3631300753.

The spelling of 289281020 in words is "two hundred eighty-nine million, two hundred eighty-one thousand, twenty".