288560991 has 16 divisors (see below), whose sum is σ = 405531360. Its totient is φ = 182232960.

The previous prime is 288560983. The next prime is 288561001. The reversal of 288560991 is 199065882.

It is a happy number.

It is not a de Polignac number, because 288560991 - 2³ = 288560983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 288560991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288560291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26680 + ... + 35901.

It is an arithmetic number, because the mean of its divisors is an integer number (25345710).

Almost surely, 2^288560991 is an apocalyptic number.

288560991 is a deficient number, since it is larger than the sum of its proper divisors (116970369).

288560991 is a wasteful number, since it uses less digits than its factorization.

288560991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62666.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 288560991 is about 16987.0830633161. The cubic root of 288560991 is about 660.8139567341.

The spelling of 288560991 in words is "two hundred eighty-eight million, five hundred sixty thousand, nine hundred ninety-one".