288644401 has 4 divisors (see below), whose sum is σ = 288716404. Its totient is φ = 288572400.

The previous prime is 288644393. The next prime is 288644407. The reversal of 288644401 is 104446882.

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 239630400 + 49014001 = 15480^2 + 7001^2 .

It is a cyclic number.

It is not a de Polignac number, because 288644401 - 2³ = 288644393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288644407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29610 + ... + 38131.

It is an arithmetic number, because the mean of its divisors is an integer number (72179101).

Almost surely, 2^288644401 is an apocalyptic number.

It is an amenable number.

288644401 is a deficient number, since it is larger than the sum of its proper divisors (72003).

288644401 is an equidigital number, since it uses as much as digits as its factorization.

288644401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72002.

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 288644401 is about 16989.5379866552. The cubic root of 288644401 is about 660.8776211285.

The spelling of 288644401 in words is "two hundred eighty-eight million, six hundred forty-four thousand, four hundred one".