22638647 has 8 divisors (see below), whose sum is σ = 24438240. Its totient is φ = 20907040.

The previous prime is 22638643. The next prime is 22638659. The reversal of 22638647 is 74683622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22638647 - 2² = 22638643 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 22638647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22638643) 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 7 ways as a sum of consecutive naturals, for example, 16304 + ... + 17637.

It is an arithmetic number, because the mean of its divisors is an integer number (3054780).

Almost surely, 2^22638647 is an apocalyptic number.

22638647 is a deficient number, since it is larger than the sum of its proper divisors (1799593).

22638647 is a wasteful number, since it uses less digits than its factorization.

22638647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33993.

The product of its digits is 96768, while the sum is 38.

The square root of 22638647 is about 4758.0087221442. The cubic root of 22638647 is about 282.8894964110.

The spelling of 22638647 in words is "twenty-two million, six hundred thirty-eight thousand, six hundred forty-seven".