43628638 has 4 divisors (see below), whose sum is σ = 65442960. Its totient is φ = 21814318.

The previous prime is 43628623. The next prime is 43628639. The reversal of 43628638 is 83682634.

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

It is a self number, because there is not a number n which added to its sum of digits gives 43628638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43628639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10907158 + ... + 10907161.

It is an arithmetic number, because the mean of its divisors is an integer number (16360740).

Almost surely, 2^43628638 is an apocalyptic number.

43628638 is a deficient number, since it is larger than the sum of its proper divisors (21814322).

43628638 is a wasteful number, since it uses less digits than its factorization.

43628638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21814321.

The product of its digits is 165888, while the sum is 40.

The square root of 43628638 is about 6605.1978017316. The cubic root of 43628638 is about 352.0388160965.

The spelling of 43628638 in words is "forty-three million, six hundred twenty-eight thousand, six hundred thirty-eight".