28148226 has 16 divisors (see below), whose sum is σ = 59608224. Its totient is φ = 8830784.

The previous prime is 28148213. The next prime is 28148249. The reversal of 28148226 is 62284182.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137880 + ... + 138083.

It is an arithmetic number, because the mean of its divisors is an integer number (3725514).

Almost surely, 2^28148226 is an apocalyptic number.

28148226 is an abundant number, since it is smaller than the sum of its proper divisors (31459998).

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

28148226 is a wasteful number, since it uses less digits than its factorization.

28148226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275985.

The product of its digits is 12288, while the sum is 33.

The square root of 28148226 is about 5305.4901752807. The cubic root of 28148226 is about 304.1937894706.

The spelling of 28148226 in words is "twenty-eight million, one hundred forty-eight thousand, two hundred twenty-six".