288749 has 4 divisors (see below), whose sum is σ = 290400. Its totient is φ = 287100.

The previous prime is 288733. The next prime is 288751. The reversal of 288749 is 947882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 288749 - 2⁴ = 288733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288049) 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, 527 + ... + 924.

It is an arithmetic number, because the mean of its divisors is an integer number (72600).

2²⁸⁸⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

288749 is a deficient number, since it is larger than the sum of its proper divisors (1651).

288749 is a wasteful number, since it uses less digits than its factorization.

288749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650.

The product of its digits is 32256, while the sum is 38.

The square root of 288749 is about 537.3537010201. The cubic root of 288749 is about 66.0957441130.

The spelling of 288749 in words is "two hundred eighty-eight thousand, seven hundred forty-nine".