28226810 has 8 divisors (see below), whose sum is σ = 50808276. Its totient is φ = 11290720.

The previous prime is 28226797. The next prime is 28226827. The reversal of 28226810 is 1862282.

It can be written as a sum of positive squares in 2 ways, for example, as 27447121 + 779689 = 5239^2 + 883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28226810² = 1593505605552200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411331 + ... + 1411350.

Almost surely, 2^28226810 is an apocalyptic number.

28226810 is a deficient number, since it is larger than the sum of its proper divisors (22581466).

28226810 is a wasteful number, since it uses less digits than its factorization.

28226810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822688.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28226810 is about 5312.8909267931. The cubic root of 28226810 is about 304.4766084006.

The spelling of 28226810 in words is "twenty-eight million, two hundred twenty-six thousand, eight hundred ten".