28226706 has 16 divisors (see below), whose sum is σ = 57088800. Its totient is φ = 9303008.

The previous prime is 28226699. The next prime is 28226711. The reversal of 28226706 is 60762282.

It is a super-2 number, since 2×28226706² = 1593493863220872, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 25896 + ... + 26963.

It is an arithmetic number, because the mean of its divisors is an integer number (3568050).

Almost surely, 2^28226706 is an apocalyptic number.

28226706 is an abundant number, since it is smaller than the sum of its proper divisors (28862094).

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

28226706 is a wasteful number, since it uses less digits than its factorization.

28226706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52953.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28226706 is about 5312.8811392690. The cubic root of 28226706 is about 304.4762344582.

Adding to 28226706 its reverse (60762282), we get a palindrome (88988988).

The spelling of 28226706 in words is "twenty-eight million, two hundred twenty-six thousand, seven hundred six".