28316933 has 4 divisors (see below), whose sum is σ = 29548128. Its totient is φ = 27085740.

The previous prime is 28316929. The next prime is 28316957. The reversal of 28316933 is 33961382.

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 28316933 - 2² = 28316929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28316893 and 28316902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28316903) 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, 615563 + ... + 615608.

It is an arithmetic number, because the mean of its divisors is an integer number (7387032).

Almost surely, 2^28316933 is an apocalyptic number.

28316933 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28316933 is a deficient number, since it is larger than the sum of its proper divisors (1231195).

28316933 is a wasteful number, since it uses less digits than its factorization.

28316933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231194.

The product of its digits is 23328, while the sum is 35.

The square root of 28316933 is about 5321.3657081618. The cubic root of 28316933 is about 304.8003100290.

The spelling of 28316933 in words is "twenty-eight million, three hundred sixteen thousand, nine hundred thirty-three".