28134825 has 24 divisors (see below), whose sum is σ = 48020736. Its totient is φ = 14520000.

The previous prime is 28134809. The next prime is 28134829. The reversal of 28134825 is 52843182.

It is not a de Polignac number, because 28134825 - 2⁴ = 28134809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28134829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3726 + ... + 8375.

It is an arithmetic number, because the mean of its divisors is an integer number (2000864).

Almost surely, 2^28134825 is an apocalyptic number.

28134825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28134825 is a deficient number, since it is larger than the sum of its proper divisors (19885911).

28134825 is a wasteful number, since it uses less digits than its factorization.

28134825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12145 (or 12140 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 28134825 is about 5304.2270878989. The cubic root of 28134825 is about 304.1455075876.

The spelling of 28134825 in words is "twenty-eight million, one hundred thirty-four thousand, eight hundred twenty-five".