28134863 has 4 divisors (see below), whose sum is σ = 28413528. Its totient is φ = 27856200.

The previous prime is 28134859. The next prime is 28134893. The reversal of 28134863 is 36843182.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28134863 - 2² = 28134859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28134803) 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, 139181 + ... + 139382.

It is an arithmetic number, because the mean of its divisors is an integer number (7103382).

Almost surely, 2^28134863 is an apocalyptic number.

28134863 is a deficient number, since it is larger than the sum of its proper divisors (278665).

28134863 is a wasteful number, since it uses less digits than its factorization.

28134863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278664.

The product of its digits is 27648, while the sum is 35.

The square root of 28134863 is about 5304.2306699464. The cubic root of 28134863 is about 304.1456445178.

The spelling of 28134863 in words is "twenty-eight million, one hundred thirty-four thousand, eight hundred sixty-three".