288440 has 16 divisors (see below), whose sum is σ = 649080. Its totient is φ = 115360.

The previous prime is 288433. The next prime is 288461. The reversal of 288440 is 44882.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 288440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566 + ... + 3645.

2²⁸⁸⁴⁴⁰ is an apocalyptic number.

288440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

288440 is an abundant number, since it is smaller than the sum of its proper divisors (360640).

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

288440 is a wasteful number, since it uses less digits than its factorization.

288440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7222 (or 7218 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 288440 is about 537.0661039388. The cubic root of 288440 is about 66.0721586061.

The spelling of 288440 in words is "two hundred eighty-eight thousand, four hundred forty".