28861226 has 4 divisors (see below), whose sum is σ = 43291842. Its totient is φ = 14430612.

The previous prime is 28861219. The next prime is 28861237. The reversal of 28861226 is 62216882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27573001 + 1288225 = 5251^2 + 1135^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7215305 + ... + 7215308.

Almost surely, 2^28861226 is an apocalyptic number.

28861226 is a deficient number, since it is larger than the sum of its proper divisors (14430616).

28861226 is a wasteful number, since it uses less digits than its factorization.

28861226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14430615.

The product of its digits is 18432, while the sum is 35.

The square root of 28861226 is about 5372.2645132197. The cubic root of 28861226 is about 306.7408324610.

The spelling of 28861226 in words is "twenty-eight million, eight hundred sixty-one thousand, two hundred twenty-six".