3646863 has 20 divisors (see below), whose sum is σ = 5944488. Its totient is φ = 2209680.

The previous prime is 3646859. The next prime is 3646883. The reversal of 3646863 is 3686463.

3646863 is a `hidden beast` number, since 3 + 646 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 3646863 - 2² = 3646859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646883) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1156 + ... + 2937.

Almost surely, 2^3646863 is an apocalyptic number.

3646863 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3646863 is a deficient number, since it is larger than the sum of its proper divisors (2297625).

3646863 is a wasteful number, since it uses less digits than its factorization.

3646863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116 (or 4107 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 3646863 is about 1909.6761505554. The cubic root of 3646863 is about 153.9240503663.

It can be divided in two parts, 364 and 6863, that added together give a palindrome (7227).

The spelling of 3646863 in words is "three million, six hundred forty-six thousand, eight hundred sixty-three".