556868240 has 20 divisors (see below), whose sum is σ = 1294718844. Its totient is φ = 222747264.

The previous prime is 556868233. The next prime is 556868243. The reversal of 556868240 is 42868655.

It can be written as a sum of positive squares in 2 ways, for example, as 385572496 + 171295744 = 19636^2 + 13088^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 556868191 and 556868200.

It is not an unprimeable number, because it can be changed into a prime (556868243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3480347 + ... + 3480506.

Almost surely, 2^556868240 is an apocalyptic number.

It is an amenable number.

556868240 is an abundant number, since it is smaller than the sum of its proper divisors (737850604).

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

556868240 is a wasteful number, since it uses less digits than its factorization.

556868240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960866 (or 6960860 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The square root of 556868240 is about 23598.0558521248. The cubic root of 556868240 is about 822.7176538016.

The spelling of 556868240 in words is "five hundred fifty-six million, eight hundred sixty-eight thousand, two hundred forty".