3638409 has 8 divisors (see below), whose sum is σ = 4906080. Its totient is φ = 2398176.

The previous prime is 3638407. The next prime is 3638413. The reversal of 3638409 is 9048363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3638409 - 2¹ = 3638407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3638409.

It is not an unprimeable number, because it can be changed into a prime (3638407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6547 + ... + 7080.

It is an arithmetic number, because the mean of its divisors is an integer number (613260).

Almost surely, 2^3638409 is an apocalyptic number.

It is an amenable number.

3638409 is a deficient number, since it is larger than the sum of its proper divisors (1267671).

3638409 is a wasteful number, since it uses less digits than its factorization.

3638409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13719.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 3638409 is about 1907.4614019686. The cubic root of 3638409 is about 153.8050183162.

The spelling of 3638409 in words is "three million, six hundred thirty-eight thousand, four hundred nine".