289670556 has 72 divisors (see below), whose sum is σ = 820471680. Its totient is φ = 79160928.

The previous prime is 289670543. The next prime is 289670597. The reversal of 289670556 is 655076982.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2815 + ... + 24233.

It is an arithmetic number, because the mean of its divisors is an integer number (11395440).

Almost surely, 2^289670556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289670556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410235840).

289670556 is an abundant number, since it is smaller than the sum of its proper divisors (530801124).

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

289670556 is a wasteful number, since it uses less digits than its factorization.

289670556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21463 (or 21454 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 289670556 is about 17019.7108083539. The cubic root of 289670556 is about 661.6598533082.

The spelling of 289670556 in words is "two hundred eighty-nine million, six hundred seventy thousand, five hundred fifty-six".