28223298 has 24 divisors (see below), whose sum is σ = 64748268. Its totient is φ = 8854272.

The previous prime is 28223263. The next prime is 28223311. The reversal of 28223298 is 89232282.

It can be written as a sum of positive squares in 2 ways, for example, as 28164249 + 59049 = 5307^2 + 243^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45811 + ... + 46422.

Almost surely, 2^28223298 is an apocalyptic number.

28223298 is an abundant number, since it is smaller than the sum of its proper divisors (36524970).

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

28223298 is a wasteful number, since it uses less digits than its factorization.

28223298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92258 (or 92255 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28223298 is about 5312.5603996566. The cubic root of 28223298 is about 304.4639801440.

The spelling of 28223298 in words is "twenty-eight million, two hundred twenty-three thousand, two hundred ninety-eight".