556385280 has 352 divisors, whose sum is σ = 2016213120. Its totient is φ = 129761280.

The previous prime is 556385279. The next prime is 556385311. The reversal of 556385280 is 82583655.

It is a tau number, because it is divible by the number of its divisors (352).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6251476 + ... + 6251564.

Almost surely, 2^556385280 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 556385280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008106560).

556385280 is an abundant number, since it is smaller than the sum of its proper divisors (1459827840).

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

556385280 is a wasteful number, since it uses less digits than its factorization.

556385280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 556385280 is about 23587.8205860567. The cubic root of 556385280 is about 822.4797431596.

The spelling of 556385280 in words is "five hundred fifty-six million, three hundred eighty-five thousand, two hundred eighty".