28752893 has 8 divisors (see below), whose sum is σ = 31008600. Its totient is φ = 26503488.

The previous prime is 28752887. The next prime is 28752907. The reversal of 28752893 is 39825782.

It can be written as a sum of positive squares in 4 ways, for example, as 1849 + 28751044 = 43^2 + 5362^2 .

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 28752893 - 2¹⁶ = 28687357 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 (28752793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12863 + ... + 14931.

It is an arithmetic number, because the mean of its divisors is an integer number (3876075).

Almost surely, 2^28752893 is an apocalyptic number.

It is an amenable number.

28752893 is a deficient number, since it is larger than the sum of its proper divisors (2255707).

28752893 is a wasteful number, since it uses less digits than its factorization.

28752893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151.

The product of its digits is 241920, while the sum is 44.

The square root of 28752893 is about 5362.1724142366. The cubic root of 28752893 is about 306.3565588927.

The spelling of 28752893 in words is "twenty-eight million, seven hundred fifty-two thousand, eight hundred ninety-three".