28266279 has 8 divisors (see below), whose sum is σ = 38165760. Its totient is φ = 18605496.

The previous prime is 28266247. The next prime is 28266283. The reversal of 28266279 is 97266282.

28266279 = 342² + 343² + ... + 499².

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

It is not a de Polignac number, because 28266279 - 2⁵ = 28266247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28266279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28266239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59397 + ... + 59870.

It is an arithmetic number, because the mean of its divisors is an integer number (4770720).

Almost surely, 2^28266279 is an apocalyptic number.

28266279 is a deficient number, since it is larger than the sum of its proper divisors (9899481).

28266279 is a wasteful number, since it uses less digits than its factorization.

28266279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119349.

The product of its digits is 145152, while the sum is 42.

The square root of 28266279 is about 5316.6040853161. The cubic root of 28266279 is about 304.6184568818.

The spelling of 28266279 in words is "twenty-eight million, two hundred sixty-six thousand, two hundred seventy-nine".