28872134 has 16 divisors (see below), whose sum is σ = 46105200. Its totient is φ = 13521024.

The previous prime is 28872127. The next prime is 28872161. The reversal of 28872134 is 43127882.

It is a junction number, because it is equal to n+sod(n) for n = 28872094 and 28872103.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 887 + ... + 7650.

It is an arithmetic number, because the mean of its divisors is an integer number (2881575).

Almost surely, 2^28872134 is an apocalyptic number.

28872134 is a deficient number, since it is larger than the sum of its proper divisors (17233066).

28872134 is a wasteful number, since it uses less digits than its factorization.

28872134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8647.

The product of its digits is 21504, while the sum is 35.

The square root of 28872134 is about 5373.2796316589. The cubic root of 28872134 is about 306.7794714706.

The spelling of 28872134 in words is "twenty-eight million, eight hundred seventy-two thousand, one hundred thirty-four".