5811988 has 36 divisors (see below), whose sum is σ = 12747252. Its totient is φ = 2298240.

The previous prime is 5811979. The next prime is 5812013. The reversal of 5811988 is 8891185.

It can be written as a sum of positive squares in 2 ways, for example, as 2079364 + 3732624 = 1442^2 + 1932^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5811988.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 1408 + ... + 3688.

Almost surely, 2^5811988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5811988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6373626).

5811988 is an abundant number, since it is smaller than the sum of its proper divisors (6935264).

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

5811988 is a wasteful number, since it uses less digits than its factorization.

5811988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2303 counting only the distinct ones).

The product of its digits is 23040, while the sum is 40.

The square root of 5811988 is about 2410.8065040563. The cubic root of 5811988 is about 179.7938792845.

The spelling of 5811988 in words is "five million, eight hundred eleven thousand, nine hundred eighty-eight".