289680306 has 64 divisors (see below), whose sum is σ = 637424640. Its totient is φ = 87671040.

The previous prime is 289680299. The next prime is 289680311. The reversal of 289680306 is 603086982.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 913660 + ... + 913976.

It is an arithmetic number, because the mean of its divisors is an integer number (9959760).

Almost surely, 2^289680306 is an apocalyptic number.

289680306 is an abundant number, since it is smaller than the sum of its proper divisors (347744334).

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

289680306 is a wasteful number, since it uses less digits than its factorization.

289680306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 289680306 is about 17019.9972385427. The cubic root of 289680306 is about 661.6672768117.

The spelling of 289680306 in words is "two hundred eighty-nine million, six hundred eighty thousand, three hundred six".