28220679 has 12 divisors (see below), whose sum is σ = 41015416. Its totient is φ = 18697392.

The previous prime is 28220671. The next prime is 28220711. The reversal of 28220679 is 97602282.

It is not a de Polignac number, because 28220679 - 2³ = 28220671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28220671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8152 + ... + 11085.

Almost surely, 2^28220679 is an apocalyptic number.

28220679 is a deficient number, since it is larger than the sum of its proper divisors (12794737).

28220679 is a wasteful number, since it uses less digits than its factorization.

28220679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19406 (or 19403 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28220679 is about 5312.3139026228. The cubic root of 28220679 is about 304.4545622058.

The spelling of 28220679 in words is "twenty-eight million, two hundred twenty thousand, six hundred seventy-nine".