289494720 has 84 divisors (see below), whose sum is σ = 995751120. Its totient is φ = 77197824.

The previous prime is 289494719. The next prime is 289494781. The reversal of 289494720 is 27494982.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47380 + ... + 53139.

It is an arithmetic number, because the mean of its divisors is an integer number (11854180).

Almost surely, 2^289494720 is an apocalyptic number.

289494720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289494720 is an abundant number, since it is smaller than the sum of its proper divisors (706256400).

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

289494720 is a wasteful number, since it uses less digits than its factorization.

289494720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100542 (or 100529 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 289494720 is about 17014.5443665118. The cubic root of 289494720 is about 661.5259458186.

The spelling of 289494720 in words is "two hundred eighty-nine million, four hundred ninety-four thousand, seven hundred twenty".