28126226 has 4 divisors (see below), whose sum is σ = 42189342. Its totient is φ = 14063112.

The previous prime is 28126187. The next prime is 28126229. The reversal of 28126226 is 62262182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62262182 = 2 ⋅31131091.

It can be written as a sum of positive squares in only one way, i.e., 15202201 + 12924025 = 3899^2 + 3595^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28126229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7031555 + ... + 7031558.

Almost surely, 2^28126226 is an apocalyptic number.

28126226 is a deficient number, since it is larger than the sum of its proper divisors (14063116).

28126226 is a wasteful number, since it uses less digits than its factorization.

28126226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14063115.

The product of its digits is 4608, while the sum is 29.

The square root of 28126226 is about 5303.4164460280. The cubic root of 28126226 is about 304.1145185468.

The spelling of 28126226 in words is "twenty-eight million, one hundred twenty-six thousand, two hundred twenty-six".