5640906 has 32 divisors (see below), whose sum is σ = 12363840. Its totient is φ = 1707776.

The previous prime is 5640883. The next prime is 5640917. The reversal of 5640906 is 6090465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2005 + ... + 3911.

It is an arithmetic number, because the mean of its divisors is an integer number (386370).

Almost surely, 2^5640906 is an apocalyptic number.

5640906 is an abundant number, since it is smaller than the sum of its proper divisors (6722934).

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

5640906 is a wasteful number, since it uses less digits than its factorization.

5640906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 5640906 is about 2375.0591571580. The cubic root of 5640906 is about 178.0121398950.

The spelling of 5640906 in words is "five million, six hundred forty thousand, nine hundred six".