5640439 has 12 divisors (see below), whose sum is σ = 6716424. Its totient is φ = 4720464.

The previous prime is 5640409. The next prime is 5640449. The reversal of 5640439 is 9340465.

5640439 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5640439 - 2⁹ = 5639927 is a prime.

It is a super-2 number, since 2×5640439² = 63629104225442, which contains 22 as substring.

It is a Duffinian number.

5640439 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 5640439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 769 + ... + 3445.

It is an arithmetic number, because the mean of its divisors is an integer number (559702).

Almost surely, 2^5640439 is an apocalyptic number.

5640439 is a deficient number, since it is larger than the sum of its proper divisors (1075985).

5640439 is a wasteful number, since it uses less digits than its factorization.

5640439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734 (or 2727 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 5640439 is about 2374.9608417824. The cubic root of 5640439 is about 178.0072273293.

The spelling of 5640439 in words is "five million, six hundred forty thousand, four hundred thirty-nine".