288397 has 4 divisors (see below), whose sum is σ = 300960. Its totient is φ = 275836.

The previous prime is 288389. The next prime is 288403. The reversal of 288397 is 793882.

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 288397 - 2³ = 288389 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 8² + 3⁹ + 8⁴ + 9 + 7⁴ .

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288307) 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, 6247 + ... + 6292.

It is an arithmetic number, because the mean of its divisors is an integer number (75240).

2²⁸⁸³⁹⁷ is an apocalyptic number.

It is an amenable number.

288397 is a deficient number, since it is larger than the sum of its proper divisors (12563).

288397 is a wasteful number, since it uses less digits than its factorization.

288397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12562.

The product of its digits is 24192, while the sum is 37.

The square root of 288397 is about 537.0260701307. The cubic root of 288397 is about 66.0688751457.

The spelling of 288397 in words is "two hundred eighty-eight thousand, three hundred ninety-seven".