5811440 has 20 divisors (see below), whose sum is σ = 13511784. Its totient is φ = 2324544.

The previous prime is 5811437. The next prime is 5811461. The reversal of 5811440 is 441185.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 36242 + ... + 36401.

Almost surely, 2^5811440 is an apocalyptic number.

It is an amenable number.

5811440 is an abundant number, since it is smaller than the sum of its proper divisors (7700344).

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

5811440 is a wasteful number, since it uses less digits than its factorization.

5811440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72656 (or 72650 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 5811440 is about 2410.6928464655. The cubic root of 5811440 is about 179.7882283126.

The spelling of 5811440 in words is "five million, eight hundred eleven thousand, four hundred forty".