28249266 has 8 divisors (see below), whose sum is σ = 56498544. Its totient is φ = 9416420.

The previous prime is 28249261. The next prime is 28249279. The reversal of 28249266 is 66294282.

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

28249266 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28249261) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2354100 + ... + 2354111.

It is an arithmetic number, because the mean of its divisors is an integer number (7062318).

Almost surely, 2^28249266 is an apocalyptic number.

28249266 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28249266 is a wasteful number, since it uses less digits than its factorization.

28249266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708216.

The product of its digits is 82944, while the sum is 39.

The square root of 28249266 is about 5315.0038570071. The cubic root of 28249266 is about 304.5573297002.

It can be divided in two parts, 2824 and 9266, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 28249266 in words is "twenty-eight million, two hundred forty-nine thousand, two hundred sixty-six".