28134816 has 24 divisors (see below), whose sum is σ = 73854144. Its totient is φ = 9378240.

The previous prime is 28134809. The next prime is 28134829. The reversal of 28134816 is 61843182.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146440 + ... + 146631.

It is an arithmetic number, because the mean of its divisors is an integer number (3077256).

Almost surely, 2^28134816 is an apocalyptic number.

It is an amenable number.

28134816 is an abundant number, since it is smaller than the sum of its proper divisors (45719328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28134816 is a wasteful number, since it uses less digits than its factorization.

28134816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293084 (or 293076 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 28134816 is about 5304.2262395188. The cubic root of 28134816 is about 304.1454751567.

Adding to 28134816 its reverse (61843182), we get a palindrome (89977998).

The spelling of 28134816 in words is "twenty-eight million, one hundred thirty-four thousand, eight hundred sixteen".