22857643 has 4 divisors (see below), whose sum is σ = 23011200. Its totient is φ = 22704088.

The previous prime is 22857631. The next prime is 22857647. The reversal of 22857643 is 34675822.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22857643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22857647) 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, 76555 + ... + 76852.

It is an arithmetic number, because the mean of its divisors is an integer number (5752800).

Almost surely, 2^22857643 is an apocalyptic number.

22857643 is a deficient number, since it is larger than the sum of its proper divisors (153557).

22857643 is a wasteful number, since it uses less digits than its factorization.

22857643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153556.

The product of its digits is 80640, while the sum is 37.

The square root of 22857643 is about 4780.9667432435. The cubic root of 22857643 is about 283.7987523210.

The spelling of 22857643 in words is "twenty-two million, eight hundred fifty-seven thousand, six hundred forty-three".