28117463 has 4 divisors (see below), whose sum is σ = 30673608. Its totient is φ = 25561320.

The previous prime is 28117433. The next prime is 28117489. The reversal of 28117463 is 36471182.

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 28117463 - 2¹² = 28113367 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 (28117423) 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, 1278056 + ... + 1278077.

It is an arithmetic number, because the mean of its divisors is an integer number (7668402).

Almost surely, 2^28117463 is an apocalyptic number.

28117463 is a deficient number, since it is larger than the sum of its proper divisors (2556145).

28117463 is a wasteful number, since it uses less digits than its factorization.

28117463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556144.

The product of its digits is 8064, while the sum is 32.

The square root of 28117463 is about 5302.5902161114. The cubic root of 28117463 is about 304.0829319849.

The spelling of 28117463 in words is "twenty-eight million, one hundred seventeen thousand, four hundred sixty-three".