28133334 has 24 divisors (see below), whose sum is σ = 64541880. Its totient is φ = 8826048.

The previous prime is 28133333. The next prime is 28133353. The reversal of 28133334 is 43333182.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28133298 and 28133307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45664 + ... + 46275.

It is an arithmetic number, because the mean of its divisors is an integer number (2689245).

Almost surely, 2^28133334 is an apocalyptic number.

28133334 is an abundant number, since it is smaller than the sum of its proper divisors (36408546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28133334 is a wasteful number, since it uses less digits than its factorization.

28133334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91964 (or 91961 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 28133334 is about 5304.0865377556. The cubic root of 28133334 is about 304.1401347805.

The spelling of 28133334 in words is "twenty-eight million, one hundred thirty-three thousand, three hundred thirty-four".