28276733 has 8 divisors (see below), whose sum is σ = 28851576. Its totient is φ = 27705600.

The previous prime is 28276727. The next prime is 28276739. The reversal of 28276733 is 33767282.

It is an interprime number because it is at equal distance from previous prime (28276727) and next prime (28276739).

It can be written as a sum of positive squares in 4 ways, for example, as 2439844 + 25836889 = 1562^2 + 5083^2 .

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 28276733 - 2⁶ = 28276669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28276739) 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, 18353 + ... + 19833.

It is an arithmetic number, because the mean of its divisors is an integer number (3606447).

Almost surely, 2^28276733 is an apocalyptic number.

It is an amenable number.

28276733 is a deficient number, since it is larger than the sum of its proper divisors (574843).

28276733 is a wasteful number, since it uses less digits than its factorization.

28276733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855.

The product of its digits is 84672, while the sum is 38.

The square root of 28276733 is about 5317.5871407999. The cubic root of 28276733 is about 304.6560056143.

The spelling of 28276733 in words is "twenty-eight million, two hundred seventy-six thousand, seven hundred thirty-three".