5581978 has 16 divisors (see below), whose sum is σ = 8731080. Its totient is φ = 2673216.

The previous prime is 5581973. The next prime is 5582009. The reversal of 5581978 is 8791855.

It can be written as a sum of positive squares in 4 ways, for example, as 2424249 + 3157729 = 1557^2 + 1777^2 .

It is not an unprimeable number, because it can be changed into a prime (5581973) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8800 + ... + 9412.

Almost surely, 2^5581978 is an apocalyptic number.

5581978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

5581978 is a deficient number, since it is larger than the sum of its proper divisors (3149102).

5581978 is a wasteful number, since it uses less digits than its factorization.

5581978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its digits is 100800, while the sum is 43.

The square root of 5581978 is about 2362.6210021923. The cubic root of 5581978 is about 177.3900979387.

The spelling of 5581978 in words is "five million, five hundred eighty-one thousand, nine hundred seventy-eight".