28809266 has 8 divisors (see below), whose sum is σ = 43302000. Its totient is φ = 14375268.

The previous prime is 28809259. The next prime is 28809311. The reversal of 28809266 is 66290882.

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

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 3 ways as a sum of consecutive naturals, for example, 13436 + ... + 15431.

It is an arithmetic number, because the mean of its divisors is an integer number (5412750).

Almost surely, 2^28809266 is an apocalyptic number.

28809266 is a deficient number, since it is larger than the sum of its proper divisors (14492734).

28809266 is a wasteful number, since it uses less digits than its factorization.

28809266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29368.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 28809266 is about 5367.4263851496. The cubic root of 28809266 is about 306.5566426881.

The spelling of 28809266 in words is "twenty-eight million, eight hundred nine thousand, two hundred sixty-six".