3638858 has 8 divisors (see below), whose sum is σ = 5514852. Its totient is φ = 1800576.

The previous prime is 3638851. The next prime is 3638879. The reversal of 3638858 is 8588363.

3638858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3636649 + 2209 = 1907^2 + 47^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638851) 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 3 ways as a sum of consecutive naturals, for example, 9185 + ... + 9572.

Almost surely, 2^3638858 is an apocalyptic number.

3638858 is a deficient number, since it is larger than the sum of its proper divisors (1875994).

3638858 is a wasteful number, since it uses less digits than its factorization.

3638858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18856.

The product of its digits is 138240, while the sum is 41.

The square root of 3638858 is about 1907.5790940352. The cubic root of 3638858 is about 153.8113448555.

The spelling of 3638858 in words is "three million, six hundred thirty-eight thousand, eight hundred fifty-eight".