3638493 has 16 divisors (see below), whose sum is σ = 5708160. Its totient is φ = 2282688.

The previous prime is 3638491. The next prime is 3638497. The reversal of 3638493 is 3948363.

It is not a de Polignac number, because 3638493 - 2¹ = 3638491 is a prime.

It is a super-2 number, since 2×3638493² = 26477262622098, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638491) 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 15 ways as a sum of consecutive naturals, for example, 3505 + ... + 4422.

It is an arithmetic number, because the mean of its divisors is an integer number (356760).

Almost surely, 2^3638493 is an apocalyptic number.

It is an amenable number.

3638493 is a deficient number, since it is larger than the sum of its proper divisors (2069667).

3638493 is a wasteful number, since it uses less digits than its factorization.

3638493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7953 (or 7947 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 3638493 is about 1907.4834206357. The cubic root of 3638493 is about 153.8062019400.

The spelling of 3638493 in words is "three million, six hundred thirty-eight thousand, four hundred ninety-three".