3638929 has 8 divisors (see below), whose sum is σ = 4200768. Its totient is φ = 3087600.

The previous prime is 3638923. The next prime is 3638941. The reversal of 3638929 is 9298363.

3638929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3638929 - 2⁹ = 3638417 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

3638929 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3638891 and 3638900.

It is not an unprimeable number, because it can be changed into a prime (3638923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1867 + ... + 3280.

It is an arithmetic number, because the mean of its divisors is an integer number (525096).

Almost surely, 2^3638929 is an apocalyptic number.

It is an amenable number.

3638929 is a deficient number, since it is larger than the sum of its proper divisors (561839).

3638929 is a wasteful number, since it uses less digits than its factorization.

3638929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255.

The product of its digits is 69984, while the sum is 40.

The square root of 3638929 is about 1907.5977039198. The cubic root of 3638929 is about 153.8123452183.

The spelling of 3638929 in words is "three million, six hundred thirty-eight thousand, nine hundred twenty-nine".