3638257 has 8 divisors (see below), whose sum is σ = 4174016. Its totient is φ = 3106512.

The previous prime is 3638251. The next prime is 3638267. The reversal of 3638257 is 7528363.

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 3638257 - 2³ = 3638249 is a prime.

3638257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3638251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1303 + ... + 2995.

It is an arithmetic number, because the mean of its divisors is an integer number (521752).

Almost surely, 2^3638257 is an apocalyptic number.

It is an amenable number.

3638257 is a deficient number, since it is larger than the sum of its proper divisors (535759).

3638257 is a wasteful number, since it uses less digits than its factorization.

3638257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its digits is 30240, while the sum is 34.

The square root of 3638257 is about 1907.4215580201. The cubic root of 3638257 is about 153.8028764745.

The spelling of 3638257 in words is "three million, six hundred thirty-eight thousand, two hundred fifty-seven".