28924133 has 24 divisors (see below), whose sum is σ = 35356608. Its totient is φ = 23170752.

The previous prime is 28924109. The next prime is 28924141. The reversal of 28924133 is 33142982.

It is a happy number.

It is not a de Polignac number, because 28924133 - 2⁸ = 28923877 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28924133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28924163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270266 + ... + 270372.

It is an arithmetic number, because the mean of its divisors is an integer number (1473192).

Almost surely, 2^28924133 is an apocalyptic number.

28924133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28924133 is a deficient number, since it is larger than the sum of its proper divisors (6432475).

28924133 is a wasteful number, since it uses less digits than its factorization.

28924133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 210 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 28924133 is about 5378.1161199810. The cubic root of 28924133 is about 306.9635319745.

The spelling of 28924133 in words is "twenty-eight million, nine hundred twenty-four thousand, one hundred thirty-three".