5581640 has 32 divisors (see below), whose sum is σ = 13106880. Its totient is φ = 2135232.

The previous prime is 5581637. The next prime is 5581651. The reversal of 5581640 is 461855.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114 + ... + 3953.

It is an arithmetic number, because the mean of its divisors is an integer number (409590).

Almost surely, 2^5581640 is an apocalyptic number.

It is an amenable number.

5581640 is an abundant number, since it is smaller than the sum of its proper divisors (7525240).

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

5581640 is a wasteful number, since it uses less digits than its factorization.

5581640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6101 (or 6097 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 5581640 is about 2362.5494703815. The cubic root of 5581640 is about 177.3865174240.

The spelling of 5581640 in words is "five million, five hundred eighty-one thousand, six hundred forty".