5638731 has 32 divisors (see below), whose sum is σ = 9123840. Its totient is φ = 3029376.

The previous prime is 5638709. The next prime is 5638751. The reversal of 5638731 is 1378365.

It is a happy number.

It is not a de Polignac number, because 5638731 - 2⁷ = 5638603 is a prime.

It is a super-2 number, since 2×5638731² = 63590574580722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5638692 and 5638701.

It is not an unprimeable number, because it can be changed into a prime (5638751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28525 + ... + 28721.

It is an arithmetic number, because the mean of its divisors is an integer number (285120).

Almost surely, 2^5638731 is an apocalyptic number.

5638731 is a deficient number, since it is larger than the sum of its proper divisors (3485109).

5638731 is a wasteful number, since it uses less digits than its factorization.

5638731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283.

The product of its digits is 15120, while the sum is 33.

The square root of 5638731 is about 2374.6012296805. The cubic root of 5638731 is about 177.9892578629.

The spelling of 5638731 in words is "five million, six hundred thirty-eight thousand, seven hundred thirty-one".