28134513 has 32 divisors (see below), whose sum is σ = 46548480. Its totient is φ = 16647120.

The previous prime is 28134511. The next prime is 28134527. The reversal of 28134513 is 31543182.

It is a happy number.

It is not a de Polignac number, because 28134513 - 2¹ = 28134511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28134511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11670 + ... + 13872.

It is an arithmetic number, because the mean of its divisors is an integer number (1454640).

Almost surely, 2^28134513 is an apocalyptic number.

It is an amenable number.

28134513 is a deficient number, since it is larger than the sum of its proper divisors (18413967).

28134513 is a wasteful number, since it uses less digits than its factorization.

28134513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266 (or 2260 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 28134513 is about 5304.1976773118. The cubic root of 28134513 is about 304.1443833137.

Adding to 28134513 its reverse (31543182), we get a palindrome (59677695).

The spelling of 28134513 in words is "twenty-eight million, one hundred thirty-four thousand, five hundred thirteen".