28220683 has 8 divisors (see below), whose sum is σ = 29317680. Its totient is φ = 27132000.

The previous prime is 28220671. The next prime is 28220711. The reversal of 28220683 is 38602282.

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 28220683 - 2⁵ = 28220651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28220623) 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, 5341 + ... + 9217.

It is an arithmetic number, because the mean of its divisors is an integer number (3664710).

Almost surely, 2^28220683 is an apocalyptic number.

28220683 is a deficient number, since it is larger than the sum of its proper divisors (1096997).

28220683 is a wasteful number, since it uses less digits than its factorization.

28220683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28220683 is about 5312.3142791066. The cubic root of 28220683 is about 304.4545765903.

The spelling of 28220683 in words is "twenty-eight million, two hundred twenty thousand, six hundred eighty-three".