5638705 has 4 divisors (see below), whose sum is σ = 6766452. Its totient is φ = 4510960.

The previous prime is 5638691. The next prime is 5638709. The reversal of 5638705 is 5078365.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2286144 + 3352561 = 1512^2 + 1831^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5638705 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5638709) 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, 563866 + ... + 563875.

It is an arithmetic number, because the mean of its divisors is an integer number (1691613).

Almost surely, 2^5638705 is an apocalyptic number.

It is an amenable number.

5638705 is a deficient number, since it is larger than the sum of its proper divisors (1127747).

5638705 is a wasteful number, since it uses less digits than its factorization.

5638705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127746.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 5638705 is about 2374.5957550707. The cubic root of 5638705 is about 177.9889842949.

It can be divided in two parts, 5638 and 705, that multiplied together give a triangular number (3974790 = T₂₈₁₉).

The spelling of 5638705 in words is "five million, six hundred thirty-eight thousand, seven hundred five".