288639361 has 4 divisors (see below), whose sum is σ = 294780672. Its totient is φ = 282498052.

The previous prime is 288639347. The next prime is 288639367. The reversal of 288639361 is 163936882.

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 288639361 - 2⁹ = 288638849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288639367) 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, 3070585 + ... + 3070678.

It is an arithmetic number, because the mean of its divisors is an integer number (73695168).

Almost surely, 2^288639361 is an apocalyptic number.

It is an amenable number.

288639361 is a deficient number, since it is larger than the sum of its proper divisors (6141311).

288639361 is an equidigital number, since it uses as much as digits as its factorization.

288639361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141310.

The product of its digits is 373248, while the sum is 46.

The square root of 288639361 is about 16989.3896594316. The cubic root of 288639361 is about 660.8737745932.

The spelling of 288639361 in words is "two hundred eighty-eight million, six hundred thirty-nine thousand, three hundred sixty-one".