5638406 has 4 divisors (see below), whose sum is σ = 8457612. Its totient is φ = 2819202.

The previous prime is 5638397. The next prime is 5638411. The reversal of 5638406 is 6048365.

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

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, 1409600 + ... + 1409603.

It is an arithmetic number, because the mean of its divisors is an integer number (2114403).

Almost surely, 2^5638406 is an apocalyptic number.

5638406 is a deficient number, since it is larger than the sum of its proper divisors (2819206).

5638406 is a wasteful number, since it uses less digits than its factorization.

5638406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819205.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 5638406 is about 2374.5327961517. The cubic root of 5638406 is about 177.9858382034.

The spelling of 5638406 in words is "five million, six hundred thirty-eight thousand, four hundred six".