4445638 has 4 divisors (see below), whose sum is σ = 6668460. Its totient is φ = 2222818.

The previous prime is 4445633. The next prime is 4445657. The reversal of 4445638 is 8365444.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111408 + ... + 1111411.

It is an arithmetic number, because the mean of its divisors is an integer number (1667115).

Almost surely, 2^4445638 is an apocalyptic number.

4445638 is a deficient number, since it is larger than the sum of its proper divisors (2222822).

4445638 is a wasteful number, since it uses less digits than its factorization.

4445638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222821.

The product of its digits is 46080, while the sum is 34.

The square root of 4445638 is about 2108.4681643316. The cubic root of 4445638 is about 164.4288547770.

The spelling of 4445638 in words is "four million, four hundred forty-five thousand, six hundred thirty-eight".