28914133 has 4 divisors (see below), whose sum is σ = 28939680. Its totient is φ = 28888588.

The previous prime is 28914121. The next prime is 28914139. The reversal of 28914133 is 33141982.

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 not a de Polignac number, because 28914133 - 2¹⁷ = 28783061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28914095 and 28914104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28914139) 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, 10993 + ... + 13366.

It is an arithmetic number, because the mean of its divisors is an integer number (7234920).

Almost surely, 2^28914133 is an apocalyptic number.

It is an amenable number.

28914133 is a deficient number, since it is larger than the sum of its proper divisors (25547).

28914133 is a wasteful number, since it uses less digits than its factorization.

28914133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25546.

The product of its digits is 5184, while the sum is 31.

The square root of 28914133 is about 5377.1863460364. The cubic root of 28914133 is about 306.9281521858.

The spelling of 28914133 in words is "twenty-eight million, nine hundred fourteen thousand, one hundred thirty-three".