561264384 has 72 divisors (see below), whose sum is σ = 1581688080. Its totient is φ = 176078848.

The previous prime is 561264323. The next prime is 561264397. The reversal of 561264384 is 483462165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8439 + ... + 34550.

It is an arithmetic number, because the mean of its divisors is an integer number (21967890).

Almost surely, 2^561264384 is an apocalyptic number.

It is an amenable number.

561264384 is an abundant number, since it is smaller than the sum of its proper divisors (1020423696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561264384 is a wasteful number, since it uses less digits than its factorization.

561264384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43025 (or 43011 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 561264384 is about 23691.0190578624. The cubic root of 561264384 is about 824.8769373833.

It can be divided in two parts, 5612 and 64384, that added together give a palindrome (69996).

The spelling of 561264384 in words is "five hundred sixty-one million, two hundred sixty-four thousand, three hundred eighty-four".