561978324 has 36 divisors (see below), whose sum is σ = 1473172064. Its totient is φ = 187325784.

The previous prime is 561978317. The next prime is 561978331. The reversal of 561978324 is 423879165.

561978324 is a `hidden beast` number, since 5 + 619 + 7 + 8 + 3 + 24 = 666.

It is an interprime number because it is at equal distance from previous prime (561978317) and next prime (561978331).

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 561978324.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 288112 + ... + 290055.

Almost surely, 2^561978324 is an apocalyptic number.

561978324 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

561978324 is an abundant number, since it is smaller than the sum of its proper divisors (911193740).

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

561978324 is a wasteful number, since it uses less digits than its factorization.

561978324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578186 (or 578172 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 561978324 is about 23706.0820044140. The cubic root of 561978324 is about 825.2265427450.

The spelling of 561978324 in words is "five hundred sixty-one million, nine hundred seventy-eight thousand, three hundred twenty-four".