28132193 has 4 divisors (see below), whose sum is σ = 28147860. Its totient is φ = 28116528.

The previous prime is 28132189. The next prime is 28132201. The reversal of 28132193 is 39123182.

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 3411409 + 24720784 = 1847^2 + 4972^2 .

It is a cyclic number.

It is not a de Polignac number, because 28132193 - 2² = 28132189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28132183) 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, 4730 + ... + 8867.

It is an arithmetic number, because the mean of its divisors is an integer number (7036965).

Almost surely, 2^28132193 is an apocalyptic number.

It is an amenable number.

28132193 is a deficient number, since it is larger than the sum of its proper divisors (15667).

28132193 is a wasteful number, since it uses less digits than its factorization.

28132193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15666.

The product of its digits is 2592, while the sum is 29.

The square root of 28132193 is about 5303.9789780881. The cubic root of 28132193 is about 304.1360230675.

The spelling of 28132193 in words is "twenty-eight million, one hundred thirty-two thousand, one hundred ninety-three".