289709648 has 20 divisors (see below), whose sum is σ = 594331380. Its totient is φ = 136333824.

The previous prime is 289709621. The next prime is 289709659. The reversal of 289709648 is 846907982.

It can be written as a sum of positive squares in 2 ways, for example, as 129231424 + 160478224 = 11368^2 + 12668^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 289709648.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532283 + ... + 532826.

It is an arithmetic number, because the mean of its divisors is an integer number (29716569).

Almost surely, 2^289709648 is an apocalyptic number.

It is an amenable number.

289709648 is an abundant number, since it is smaller than the sum of its proper divisors (304621732).

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

289709648 is a wasteful number, since it uses less digits than its factorization.

289709648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065134 (or 1065128 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 289709648 is about 17020.8592027547. The cubic root of 289709648 is about 661.6896163649.

The spelling of 289709648 in words is "two hundred eighty-nine million, seven hundred nine thousand, six hundred forty-eight".