4401639 has 24 divisors (see below), whose sum is σ = 7003152. Its totient is φ = 2641920.

The previous prime is 4401601. The next prime is 4401641. The reversal of 4401639 is 9361044.

4401639 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4401639 - 2¹³ = 4393447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4400639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16999 + ... + 17255.

It is an arithmetic number, because the mean of its divisors is an integer number (291798).

Almost surely, 2^4401639 is an apocalyptic number.

4401639 is a deficient number, since it is larger than the sum of its proper divisors (2601513).

4401639 is a wasteful number, since it uses less digits than its factorization.

4401639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 4401639 is about 2098.0083412608. The cubic root of 4401639 is about 163.8845980725.

The spelling of 4401639 in words is "four million, four hundred one thousand, six hundred thirty-nine".