5811840 has 96 divisors (see below), whose sum is σ = 20088900. Its totient is φ = 1548288.

The previous prime is 5811833. The next prime is 5811863. The reversal of 5811840 is 481185.

5811840 is a `hidden beast` number, since 581 + 1 + 84 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 166464 = 2376^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5256 + ... + 6264.

Almost surely, 2^5811840 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 5811840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10044450).

5811840 is an abundant number, since it is smaller than the sum of its proper divisors (14277060).

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

5811840 is a wasteful number, since it uses less digits than its factorization.

5811840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 5811840 is about 2410.7758087388. The cubic root of 5811840 is about 179.7923531446.

The spelling of 5811840 in words is "five million, eight hundred eleven thousand, eight hundred forty".