288891265 has 16 divisors (see below), whose sum is σ = 373712976. Its totient is φ = 213120000.

The previous prime is 288891259. The next prime is 288891277. The reversal of 288891265 is 562198882.

It can be written as a sum of positive squares in 8 ways, for example, as 22581504 + 266309761 = 4752^2 + 16319^2 .

It is not a de Polignac number, because 288891265 - 2⁹ = 288890753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94765 + ... + 97765.

It is an arithmetic number, because the mean of its divisors is an integer number (23357061).

Almost surely, 2^288891265 is an apocalyptic number.

It is an amenable number.

288891265 is a deficient number, since it is larger than the sum of its proper divisors (84821711).

288891265 is a wasteful number, since it uses less digits than its factorization.

288891265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500.

The product of its digits is 552960, while the sum is 49.

The square root of 288891265 is about 16996.8016108914. The cubic root of 288891265 is about 661.0659733062.

The spelling of 288891265 in words is "two hundred eighty-eight million, eight hundred ninety-one thousand, two hundred sixty-five".