264144399 has 16 divisors (see below), whose sum is σ = 361122432. Its totient is φ = 171648288.

The previous prime is 264144389. The next prime is 264144407. The reversal of 264144399 is 993441462.

It is not a de Polignac number, because 264144399 - 2⁵ = 264144367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 264144399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264144329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70809 + ... + 74445.

It is an arithmetic number, because the mean of its divisors is an integer number (22570152).

Almost surely, 2^264144399 is an apocalyptic number.

264144399 is a deficient number, since it is larger than the sum of its proper divisors (96978033).

264144399 is a wasteful number, since it uses less digits than its factorization.

264144399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246.

The product of its digits is 186624, while the sum is 42.

The square root of 264144399 is about 16252.5197738689. The cubic root of 264144399 is about 641.6238054765.

The spelling of 264144399 in words is "two hundred sixty-four million, one hundred forty-four thousand, three hundred ninety-nine".