5640660 has 36 divisors (see below), whose sum is σ = 17110548. Its totient is φ = 1504128.

The previous prime is 5640659. The next prime is 5640671. The reversal of 5640660 is 660465.

It can be written as a sum of positive squares in 2 ways, for example, as 3992004 + 1648656 = 1998^2 + 1284^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 15489 + ... + 15848.

It is an arithmetic number, because the mean of its divisors is an integer number (475293).

Almost surely, 2^5640660 is an apocalyptic number.

It is an amenable number.

5640660 is an abundant number, since it is smaller than the sum of its proper divisors (11469888).

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

5640660 is a wasteful number, since it uses less digits than its factorization.

5640660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31352 (or 31347 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 5640660 is about 2375.0073684096. The cubic root of 5640660 is about 178.0095521533.

The spelling of 5640660 in words is "five million, six hundred forty thousand, six hundred sixty".