556561280 has 96 divisors (see below), whose sum is σ = 1462686120. Its totient is φ = 202357760.

The previous prime is 556561279. The next prime is 556561309. The reversal of 556561280 is 82165655.

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 11 ways as a sum of consecutive naturals, for example, 73847 + ... + 81033.

Almost surely, 2^556561280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731343060).

556561280 is an abundant number, since it is smaller than the sum of its proper divisors (906124840).

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

556561280 is a wasteful number, since it uses less digits than its factorization.

556561280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7228 (or 7205 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 556561280 is about 23591.5510299768. The cubic root of 556561280 is about 822.5664583545.

The spelling of 556561280 in words is "five hundred fifty-six million, five hundred sixty-one thousand, two hundred eighty".