5640646 has 8 divisors (see below), whose sum is σ = 9230184. Its totient is φ = 2563920.

The previous prime is 5640643. The next prime is 5640659. The reversal of 5640646 is 6460465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128175 + ... + 128218.

It is an arithmetic number, because the mean of its divisors is an integer number (1153773).

Almost surely, 2^5640646 is an apocalyptic number.

5640646 is a deficient number, since it is larger than the sum of its proper divisors (3589538).

5640646 is a wasteful number, since it uses less digits than its factorization.

5640646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256406.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 5640646 is about 2375.0044210485. The cubic root of 5640646 is about 178.0094048812.

The spelling of 5640646 in words is "five million, six hundred forty thousand, six hundred forty-six".