5811640 has 32 divisors (see below), whose sum is σ = 13646880. Its totient is φ = 2223232.

The previous prime is 5811607. The next prime is 5811643. The reversal of 5811640 is 461185.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5811643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2239 + ... + 4078.

It is an arithmetic number, because the mean of its divisors is an integer number (426465).

Almost surely, 2^5811640 is an apocalyptic number.

It is an amenable number.

5811640 is an abundant number, since it is smaller than the sum of its proper divisors (7835240).

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

5811640 is a wasteful number, since it uses less digits than its factorization.

5811640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6351 (or 6347 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 5811640 is about 2410.7343279590. The cubic root of 5811640 is about 179.7902907523.

The spelling of 5811640 in words is "five million, eight hundred eleven thousand, six hundred forty".