3638443 has 4 divisors (see below), whose sum is σ = 3829960. Its totient is φ = 3446928.

The previous prime is 3638419. The next prime is 3638473. The reversal of 3638443 is 3448363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3448363 = 37 ⋅93199.

It is a cyclic number.

It is not a de Polignac number, because 3638443 - 2²¹ = 1541291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3638413) 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, 95730 + ... + 95767.

It is an arithmetic number, because the mean of its divisors is an integer number (957490).

Almost surely, 2^3638443 is an apocalyptic number.

3638443 is a deficient number, since it is larger than the sum of its proper divisors (191517).

3638443 is a wasteful number, since it uses less digits than its factorization.

3638443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191516.

The product of its digits is 20736, while the sum is 31.

The square root of 3638443 is about 1907.4703143168. The cubic root of 3638443 is about 153.8054974042.

The spelling of 3638443 in words is "three million, six hundred thirty-eight thousand, four hundred forty-three".