5655978 has 24 divisors (see below), whose sum is σ = 12324000. Its totient is φ = 1874664.

The previous prime is 5655961. The next prime is 5655997. The reversal of 5655978 is 8795565.

5655978 is a `hidden beast` number, since 56 + 5 + 597 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2793 + ... + 4371.

It is an arithmetic number, because the mean of its divisors is an integer number (513500).

Almost surely, 2^5655978 is an apocalyptic number.

5655978 is an abundant number, since it is smaller than the sum of its proper divisors (6668022).

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

5655978 is a wasteful number, since it uses less digits than its factorization.

5655978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786 (or 1783 counting only the distinct ones).

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

The square root of 5655978 is about 2378.2300141071. The cubic root of 5655978 is about 178.1705431098.

The spelling of 5655978 in words is "five million, six hundred fifty-five thousand, nine hundred seventy-eight".