561323304 has 64 divisors (see below), whose sum is σ = 1613016000. Its totient is φ = 180653760.

The previous prime is 561323299. The next prime is 561323317. The reversal of 561323304 is 403323165.

It is a happy number.

It is a super-2 number, since 2×561323304² = 630167703226952832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 38542 + ... + 51069.

It is an arithmetic number, because the mean of its divisors is an integer number (25203375).

Almost surely, 2^561323304 is an apocalyptic number.

561323304 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

561323304 is an abundant number, since it is smaller than the sum of its proper divisors (1051692696).

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

561323304 is a wasteful number, since it uses less digits than its factorization.

561323304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89655 (or 89645 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 561323304 is about 23692.2625344225. The cubic root of 561323304 is about 824.9058008149.

Adding to 561323304 its reverse (403323165), we get a palindrome (964646469).

The spelling of 561323304 in words is "five hundred sixty-one million, three hundred twenty-three thousand, three hundred four".