28933317 has 24 divisors (see below), whose sum is σ = 47975616. Its totient is φ = 16459776.

The previous prime is 28933301. The next prime is 28933321. The reversal of 28933317 is 71333982.

It is a happy number.

It is not a de Polignac number, because 28933317 - 2⁴ = 28933301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28933327) 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, 15298 + ... + 17084.

It is an arithmetic number, because the mean of its divisors is an integer number (1998984).

Almost surely, 2^28933317 is an apocalyptic number.

It is an amenable number.

28933317 is a deficient number, since it is larger than the sum of its proper divisors (19042299).

28933317 is a wasteful number, since it uses less digits than its factorization.

28933317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057 (or 2054 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 28933317 is about 5378.9698827935. The cubic root of 28933317 is about 306.9960175896.

The spelling of 28933317 in words is "twenty-eight million, nine hundred thirty-three thousand, three hundred seventeen".