28728134 has 12 divisors (see below), whose sum is σ = 44530092. Its totient is φ = 13899780.

The previous prime is 28728121. The next prime is 28728151. The reversal of 28728134 is 43182782.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28728094 and 28728103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5552 + ... + 9395.

It is an arithmetic number, because the mean of its divisors is an integer number (3710841).

Almost surely, 2^28728134 is an apocalyptic number.

28728134 is a deficient number, since it is larger than the sum of its proper divisors (15801958).

28728134 is a wasteful number, since it uses less digits than its factorization.

28728134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15011 (or 14980 counting only the distinct ones).

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

The square root of 28728134 is about 5359.8632445241. The cubic root of 28728134 is about 306.2685995090.

The spelling of 28728134 in words is "twenty-eight million, seven hundred twenty-eight thousand, one hundred thirty-four".