28699227 has 6 divisors (see below), whose sum is σ = 41454452. Its totient is φ = 19132812.

The previous prime is 28699217. The next prime is 28699243. The reversal of 28699227 is 72299682.

It is not a de Polignac number, because 28699227 - 2⁶ = 28699163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28699217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1594393 + ... + 1594410.

Almost surely, 2^28699227 is an apocalyptic number.

28699227 is a deficient number, since it is larger than the sum of its proper divisors (12755225).

28699227 is a wasteful number, since it uses less digits than its factorization.

28699227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188809 (or 3188806 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 28699227 is about 5357.1659485217. The cubic root of 28699227 is about 306.1658398757.

The spelling of 28699227 in words is "twenty-eight million, six hundred ninety-nine thousand, two hundred twenty-seven".