3643263 has 12 divisors (see below), whose sum is σ = 5667480. Its totient is φ = 2241936.

The previous prime is 3643217. The next prime is 3643267. The reversal of 3643263 is 3623463.

It is not a de Polignac number, because 3643263 - 2¹⁰ = 3642239 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 3² + 6⁸ + 4⁹ + 3⁷ + 2³ + 6⁸ + 3⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15453 + ... + 15686.

It is an arithmetic number, because the mean of its divisors is an integer number (472290).

Almost surely, 2^3643263 is an apocalyptic number.

3643263 is a deficient number, since it is larger than the sum of its proper divisors (2024217).

3643263 is a wasteful number, since it uses less digits than its factorization.

3643263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31158 (or 31155 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

The square root of 3643263 is about 1908.7333496327. The cubic root of 3643263 is about 153.8733849938.

The spelling of 3643263 in words is "three million, six hundred forty-three thousand, two hundred sixty-three".