28156746 has 32 divisors (see below), whose sum is σ = 60264000. Its totient is φ = 8743680.

The previous prime is 28156721. The next prime is 28156763. The reversal of 28156746 is 64765182.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 4930 + ... + 8978.

It is an arithmetic number, because the mean of its divisors is an integer number (1883250).

Almost surely, 2^28156746 is an apocalyptic number.

28156746 is an abundant number, since it is smaller than the sum of its proper divisors (32107254).

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

28156746 is a wasteful number, since it uses less digits than its factorization.

28156746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134.

The product of its digits is 80640, while the sum is 39.

The square root of 28156746 is about 5306.2930563624. The cubic root of 28156746 is about 304.2244778420.

The spelling of 28156746 in words is "twenty-eight million, one hundred fifty-six thousand, seven hundred forty-six".