28694093 has 4 divisors (see below), whose sum is σ = 28707900. Its totient is φ = 28680288.

The previous prime is 28694053. The next prime is 28694117. The reversal of 28694093 is 39049682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25532809 + 3161284 = 5053^2 + 1778^2 .

It is a cyclic number.

It is not a de Polignac number, because 28694093 - 2⁸ = 28693837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28694093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28694053) 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, 3080 + ... + 8177.

It is an arithmetic number, because the mean of its divisors is an integer number (7176975).

Almost surely, 2^28694093 is an apocalyptic number.

It is an amenable number.

28694093 is a deficient number, since it is larger than the sum of its proper divisors (13807).

28694093 is a wasteful number, since it uses less digits than its factorization.

28694093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13806.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 28694093 is about 5356.6867558221. The cubic root of 28694093 is about 306.1475821347.

The spelling of 28694093 in words is "twenty-eight million, six hundred ninety-four thousand, ninety-three".