288640266 has 16 divisors (see below), whose sum is σ = 581827584. Its totient is φ = 95455584.

The previous prime is 288640259. The next prime is 288640283. The reversal of 288640266 is 662046882.

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 7 ways as a sum of consecutive naturals, for example, 188635 + ... + 190158.

It is an arithmetic number, because the mean of its divisors is an integer number (36364224).

Almost surely, 2^288640266 is an apocalyptic number.

288640266 is an abundant number, since it is smaller than the sum of its proper divisors (293187318).

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

288640266 is a wasteful number, since it uses less digits than its factorization.

288640266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378925.

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 288640266 is about 16989.4162936812. The cubic root of 288640266 is about 660.8744652938.

The spelling of 288640266 in words is "two hundred eighty-eight million, six hundred forty thousand, two hundred sixty-six".