28169226 has 24 divisors (see below), whose sum is σ = 61405344. Its totient is φ = 9332520.

The previous prime is 28169209. The next prime is 28169231. The reversal of 28169226 is 62296182.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1680 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (2558556).

Almost surely, 2^28169226 is an apocalyptic number.

28169226 is an abundant number, since it is smaller than the sum of its proper divisors (33236118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28169226 is a wasteful number, since it uses less digits than its factorization.

28169226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9546 (or 9543 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 28169226 is about 5307.4688882743. The cubic root of 28169226 is about 304.2694186491.

The spelling of 28169226 in words is "twenty-eight million, one hundred sixty-nine thousand, two hundred twenty-six".