28738133 has 8 divisors (see below), whose sum is σ = 29515200. Its totient is φ = 27970848.

The previous prime is 28738121. The next prime is 28738139. The reversal of 28738133 is 33183782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28738133 - 2⁴ = 28738117 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 = 28738093 and 28738102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28738139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3713 + ... + 8441.

It is an arithmetic number, because the mean of its divisors is an integer number (3689400).

Almost surely, 2^28738133 is an apocalyptic number.

It is an amenable number.

28738133 is a deficient number, since it is larger than the sum of its proper divisors (777067).

28738133 is a wasteful number, since it uses less digits than its factorization.

28738133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891.

The product of its digits is 24192, while the sum is 35.

The square root of 28738133 is about 5360.7959297104. The cubic root of 28738133 is about 306.3041282640.

The spelling of 28738133 in words is "twenty-eight million, seven hundred thirty-eight thousand, one hundred thirty-three".