28222647 has 8 divisors (see below), whose sum is σ = 37795440. Its totient is φ = 18732480.

The previous prime is 28222631. The next prime is 28222681. The reversal of 28222647 is 74622282.

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

It is not a de Polignac number, because 28222647 - 2⁴ = 28222631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28222697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19854 + ... + 21227.

It is an arithmetic number, because the mean of its divisors is an integer number (4724430).

Almost surely, 2^28222647 is an apocalyptic number.

28222647 is a deficient number, since it is larger than the sum of its proper divisors (9572793).

28222647 is a wasteful number, since it uses less digits than its factorization.

28222647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41313.

The product of its digits is 21504, while the sum is 33.

The square root of 28222647 is about 5312.4991294117. The cubic root of 28222647 is about 304.4616391989.

The spelling of 28222647 in words is "twenty-eight million, two hundred twenty-two thousand, six hundred forty-seven".