289280856 has 32 divisors (see below), whose sum is σ = 730229760. Its totient is φ = 95489952.

The previous prime is 289280851. The next prime is 289280861. The reversal of 289280856 is 658082982.

It is an interprime number because it is at equal distance from previous prime (289280851) and next prime (289280861).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289280851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56040 + ... + 60983.

It is an arithmetic number, because the mean of its divisors is an integer number (22819680).

Almost surely, 2^289280856 is an apocalyptic number.

It is an amenable number.

289280856 is an abundant number, since it is smaller than the sum of its proper divisors (440948904).

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

289280856 is a wasteful number, since it uses less digits than its factorization.

289280856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117135 (or 117131 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 289280856 is about 17008.2584646401. The cubic root of 289280856 is about 661.3630050947.

The spelling of 289280856 in words is "two hundred eighty-nine million, two hundred eighty thousand, eight hundred fifty-six".