28354133 has 4 divisors (see below), whose sum is σ = 28377420. Its totient is φ = 28330848.

The previous prime is 28354121. The next prime is 28354153. The reversal of 28354133 is 33145382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20857489 + 7496644 = 4567^2 + 2738^2 .

It is a cyclic number.

It is not a de Polignac number, because 28354133 - 2⁶ = 28354069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28354096 and 28354105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28354153) 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, 9710 + ... + 12287.

It is an arithmetic number, because the mean of its divisors is an integer number (7094355).

Almost surely, 2^28354133 is an apocalyptic number.

It is an amenable number.

28354133 is a deficient number, since it is larger than the sum of its proper divisors (23287).

28354133 is a wasteful number, since it uses less digits than its factorization.

28354133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23286.

The product of its digits is 8640, while the sum is 29.

The square root of 28354133 is about 5324.8599042604. The cubic root of 28354133 is about 304.9337238417.

The spelling of 28354133 in words is "twenty-eight million, three hundred fifty-four thousand, one hundred thirty-three".