28279033 has 4 divisors (see below), whose sum is σ = 28452688. Its totient is φ = 28105380.

The previous prime is 28279021. The next prime is 28279039. The reversal of 28279033 is 33097282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28279033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28279033.

It is not an unprimeable number, because it can be changed into a prime (28279039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86583 + ... + 86908.

It is an arithmetic number, because the mean of its divisors is an integer number (7113172).

Almost surely, 2^28279033 is an apocalyptic number.

It is an amenable number.

28279033 is a deficient number, since it is larger than the sum of its proper divisors (173655).

28279033 is a wasteful number, since it uses less digits than its factorization.

28279033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173654.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 28279033 is about 5317.8033999011. The cubic root of 28279033 is about 304.6642655243.

The spelling of 28279033 in words is "twenty-eight million, two hundred seventy-nine thousand, thirty-three".