3623643 has 16 divisors (see below), whose sum is σ = 5424640. Its totient is φ = 2390472.

The previous prime is 3623639. The next prime is 3623657. The reversal of 3623643 is 3463263.

It is not a de Polignac number, because 3623643 - 2² = 3623639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

3623643 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3623143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2130 + ... + 3432.

It is an arithmetic number, because the mean of its divisors is an integer number (339040).

Almost surely, 2^3623643 is an apocalyptic number.

3623643 is a deficient number, since it is larger than the sum of its proper divisors (1800997).

3623643 is a wasteful number, since it uses less digits than its factorization.

3623643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1409 counting only the distinct ones).

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

The square root of 3623643 is about 1903.5868774500. The cubic root of 3623643 is about 153.5966704601.

It can be divided in two parts, 362 and 3643, that added together give a triangular number (4005 = T₈₉).

The spelling of 3623643 in words is "three million, six hundred twenty-three thousand, six hundred forty-three".