5638742 has 4 divisors (see below), whose sum is σ = 8458116. Its totient is φ = 2819370.

The previous prime is 5638709. The next prime is 5638751. The reversal of 5638742 is 2478365.

It is a happy number.

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

It is a super-2 number, since 2×5638742² = 63590822685128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1409684 + ... + 1409687.

It is an arithmetic number, because the mean of its divisors is an integer number (2114529).

Almost surely, 2^5638742 is an apocalyptic number.

5638742 is a deficient number, since it is larger than the sum of its proper divisors (2819374).

5638742 is a wasteful number, since it uses less digits than its factorization.

5638742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819373.

The product of its digits is 40320, while the sum is 35.

The square root of 5638742 is about 2374.6035458577. The cubic root of 5638742 is about 177.9893736029.

The spelling of 5638742 in words is "five million, six hundred thirty-eight thousand, seven hundred forty-two".