5639640 has 32 divisors (see below), whose sum is σ = 16919280. Its totient is φ = 1503872.

The previous prime is 5639617. The next prime is 5639693. The reversal of 5639640 is 469365.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23379 + ... + 23618.

Almost surely, 2^5639640 is an apocalyptic number.

It is an amenable number.

5639640 is an abundant number, since it is smaller than the sum of its proper divisors (11279640).

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

5639640 is a wasteful number, since it uses less digits than its factorization.

5639640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47011 (or 47007 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 5639640 is about 2374.7926225252. The cubic root of 5639640 is about 177.9988216898.

The spelling of 5639640 in words is "five million, six hundred thirty-nine thousand, six hundred forty".