288721128 has 32 divisors (see below), whose sum is σ = 724370400. Its totient is φ = 95898048.

The previous prime is 288721091. The next prime is 288721151. The reversal of 288721128 is 821127882.

288721128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14463 + ... + 28046.

It is an arithmetic number, because the mean of its divisors is an integer number (22636575).

Almost surely, 2^288721128 is an apocalyptic number.

It is an amenable number.

288721128 is an abundant number, since it is smaller than the sum of its proper divisors (435649272).

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

288721128 is a wasteful number, since it uses less digits than its factorization.

288721128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42801 (or 42797 counting only the distinct ones).

The product of its digits is 28672, while the sum is 39.

The square root of 288721128 is about 16991.7959027291. The cubic root of 288721128 is about 660.9361737568.

The spelling of 288721128 in words is "two hundred eighty-eight million, seven hundred twenty-one thousand, one hundred twenty-eight".