5556978 has 64 divisors (see below), whose sum is σ = 14403840. Its totient is φ = 1555200.

The previous prime is 5556959. The next prime is 5556983. The reversal of 5556978 is 8796555.

5556978 is a `hidden beast` number, since 5 + 556 + 97 + 8 = 666.

5556978 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 22938 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (225060).

Almost surely, 2^5556978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5556978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7201920).

5556978 is an abundant number, since it is smaller than the sum of its proper divisors (8846862).

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

5556978 is a wasteful number, since it uses less digits than its factorization.

5556978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 314 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The square root of 5556978 is about 2357.3243306766. The cubic root of 5556978 is about 177.1248759683.

The spelling of 5556978 in words is "five million, five hundred fifty-six thousand, nine hundred seventy-eight".