289322768 has 20 divisors (see below), whose sum is σ = 640643520. Its totient is φ = 123995424.

The previous prime is 289322749. The next prime is 289322771. The reversal of 289322768 is 867223982.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 1291508 + ... + 1291731.

It is an arithmetic number, because the mean of its divisors is an integer number (32032176).

Almost surely, 2^289322768 is an apocalyptic number.

289322768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

289322768 is an abundant number, since it is smaller than the sum of its proper divisors (351320752).

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

289322768 is a wasteful number, since it uses less digits than its factorization.

289322768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583254 (or 2583248 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 289322768 is about 17009.4905273497. The cubic root of 289322768 is about 661.3949437305.

The spelling of 289322768 in words is "two hundred eighty-nine million, three hundred twenty-two thousand, seven hundred sixty-eight".