3622639 has 4 divisors (see below), whose sum is σ = 3631024. Its totient is φ = 3614256.

The previous prime is 3622631. The next prime is 3622643. The reversal of 3622639 is 9362263.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3622639 - 2³ = 3622631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3622639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3622631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3507 + ... + 4420.

It is an arithmetic number, because the mean of its divisors is an integer number (907756).

Almost surely, 2^3622639 is an apocalyptic number.

3622639 is a deficient number, since it is larger than the sum of its proper divisors (8385).

3622639 is an equidigital number, since it uses as much as digits as its factorization.

3622639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8384.

The product of its digits is 11664, while the sum is 31.

The square root of 3622639 is about 1903.3231464993. The cubic root of 3622639 is about 153.5824835123.

The spelling of 3622639 in words is "three million, six hundred twenty-two thousand, six hundred thirty-nine".