28792228 has 24 divisors (see below), whose sum is σ = 53000640. Its totient is φ = 13659360.

The previous prime is 28792207. The next prime is 28792229. The reversal of 28792228 is 82229782.

It is not an unprimeable number, because it can be changed into a prime (28792229) 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, 10858 + ... + 13246.

It is an arithmetic number, because the mean of its divisors is an integer number (2208360).

Almost surely, 2^28792228 is an apocalyptic number.

It is an amenable number.

28792228 is a deficient number, since it is larger than the sum of its proper divisors (24208412).

28792228 is a wasteful number, since it uses less digits than its factorization.

28792228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547 (or 2545 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 28792228 is about 5365.8389837937. The cubic root of 28792228 is about 306.4961975281.

The spelling of 28792228 in words is "twenty-eight million, seven hundred ninety-two thousand, two hundred twenty-eight".