28956133 has 4 divisors (see below), whose sum is σ = 30480160. Its totient is φ = 27432108.

The previous prime is 28956131. The next prime is 28956167. The reversal of 28956133 is 33165982.

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 28956133 - 2¹ = 28956131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28956092 and 28956101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28956131) 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, 761985 + ... + 762022.

It is an arithmetic number, because the mean of its divisors is an integer number (7620040).

Almost surely, 2^28956133 is an apocalyptic number.

It is an amenable number.

28956133 is a deficient number, since it is larger than the sum of its proper divisors (1524027).

28956133 is a wasteful number, since it uses less digits than its factorization.

28956133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524026.

The product of its digits is 38880, while the sum is 37.

The square root of 28956133 is about 5381.0903170268. The cubic root of 28956133 is about 307.0766925289.

The spelling of 28956133 in words is "twenty-eight million, nine hundred fifty-six thousand, one hundred thirty-three".