288831280 has 20 divisors (see below), whose sum is σ = 671532912. Its totient is φ = 115532480.

The previous prime is 288831259. The next prime is 288831281. The reversal of 288831280 is 82138882.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (288831281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805116 + ... + 1805275.

Almost surely, 2^288831280 is an apocalyptic number.

288831280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

288831280 is an abundant number, since it is smaller than the sum of its proper divisors (382701632).

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

288831280 is a wasteful number, since it uses less digits than its factorization.

288831280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610404 (or 3610398 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 288831280 is about 16995.0369225842. The cubic root of 288831280 is about 661.0202158511.

The spelling of 288831280 in words is "two hundred eighty-eight million, eight hundred thirty-one thousand, two hundred eighty".