288388249 has 4 divisors (see below), whose sum is σ = 296182564. Its totient is φ = 280593936.

The previous prime is 288388241. The next prime is 288388271. The reversal of 288388249 is 942883882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120297024 + 168091225 = 10968^2 + 12965^2 .

It is a cyclic number.

It is not a de Polignac number, because 288388249 - 2³ = 288388241 is a prime.

It is a super-2 number, since 2×288388249² = 166335564322572002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 288388196 and 288388205.

It is not an unprimeable number, because it can be changed into a prime (288388241) 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, 3897102 + ... + 3897175.

It is an arithmetic number, because the mean of its divisors is an integer number (74045641).

Almost surely, 2^288388249 is an apocalyptic number.

It is an amenable number.

288388249 is a deficient number, since it is larger than the sum of its proper divisors (7794315).

288388249 is an equidigital number, since it uses as much as digits as its factorization.

288388249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7794314.

The product of its digits is 1769472, while the sum is 52.

The square root of 288388249 is about 16981.9977917794. The cubic root of 288388249 is about 660.6820688332.

The spelling of 288388249 in words is "two hundred eighty-eight million, three hundred eighty-eight thousand, two hundred forty-nine".