289539240 has 64 divisors (see below), whose sum is σ = 919719360. Its totient is φ = 72668160.

The previous prime is 289539193. The next prime is 289539247. The reversal of 289539240 is 42935982.

It is a junction number, because it is equal to n+sod(n) for n = 289539192 and 289539201.

It is not an unprimeable number, because it can be changed into a prime (289539247) 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, 68926 + ... + 73005.

It is an arithmetic number, because the mean of its divisors is an integer number (14370615).

Almost surely, 2^289539240 is an apocalyptic number.

289539240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289539240 is an abundant number, since it is smaller than the sum of its proper divisors (630180120).

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

289539240 is a wasteful number, since it uses less digits than its factorization.

289539240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141962 (or 141958 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 289539240 is about 17015.8526086705. The cubic root of 289539240 is about 661.5598550444.

The spelling of 289539240 in words is "two hundred eighty-nine million, five hundred thirty-nine thousand, two hundred forty".