5581994 has 16 divisors (see below), whose sum is σ = 9170496. Its totient is φ = 2527200.

The previous prime is 5581973. The next prime is 5582009. The reversal of 5581994 is 4991855.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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, 10454 + ... + 10974.

It is an arithmetic number, because the mean of its divisors is an integer number (573156).

Almost surely, 2^5581994 is an apocalyptic number.

5581994 is a deficient number, since it is larger than the sum of its proper divisors (3588502).

5581994 is a wasteful number, since it uses less digits than its factorization.

5581994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its digits is 64800, while the sum is 41.

The square root of 5581994 is about 2362.6243882598. The cubic root of 5581994 is about 177.3902674270.

It can be divided in two parts, 558 and 1994, that added together give a palindrome (2552).

The spelling of 5581994 in words is "five million, five hundred eighty-one thousand, nine hundred ninety-four".