5561988 has 24 divisors (see below), whose sum is σ = 13329792. Its totient is φ = 1803744.

The previous prime is 5561981. The next prime is 5561993. The reversal of 5561988 is 8891655.

It is not an unprimeable number, because it can be changed into a prime (5561981) 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, 5820 + ... + 6707.

It is an arithmetic number, because the mean of its divisors is an integer number (555408).

Almost surely, 2^5561988 is an apocalyptic number.

It is an amenable number.

5561988 is an abundant number, since it is smaller than the sum of its proper divisors (7767804).

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

5561988 is a wasteful number, since it uses less digits than its factorization.

5561988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12571 (or 12569 counting only the distinct ones).

The product of its digits is 86400, while the sum is 42.

The square root of 5561988 is about 2358.3867367334. The cubic root of 5561988 is about 177.1780900881.

The spelling of 5561988 in words is "five million, five hundred sixty-one thousand, nine hundred eighty-eight".