556039980 has 72 divisors (see below), whose sum is σ = 1699601904. Its totient is φ = 147139200.

The previous prime is 556039943. The next prime is 556039993. The reversal of 556039980 is 89930655.

556039980 is a `hidden beast` number, since 5 + 560 + 3 + 9 + 9 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11790 + ... + 35370.

It is an arithmetic number, because the mean of its divisors is an integer number (23605582).

Almost surely, 2^556039980 is an apocalyptic number.

It is a pronic number, being equal to 23580×23581.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556039980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849800952).

556039980 is an abundant number, since it is smaller than the sum of its proper divisors (1143561924).

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

556039980 is a wasteful number, since it uses less digits than its factorization.

556039980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23727 (or 23722 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 556039980 is about 23580.4999946990. The cubic root of 556039980 is about 822.3095607113.

The spelling of 556039980 in words is "five hundred fifty-six million, thirty-nine thousand, nine hundred eighty".