28156936 has 16 divisors (see below), whose sum is σ = 55573200. Its totient is φ = 13337424.

The previous prime is 28156927. The next prime is 28156937. The reversal of 28156936 is 63965182.

It is not an unprimeable number, because it can be changed into a prime (28156937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92470 + ... + 92773.

It is an arithmetic number, because the mean of its divisors is an integer number (3473325).

Almost surely, 2^28156936 is an apocalyptic number.

It is an amenable number.

28156936 is a deficient number, since it is larger than the sum of its proper divisors (27416264).

28156936 is a wasteful number, since it uses less digits than its factorization.

28156936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185268 (or 185264 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 28156936 is about 5306.3109596027. The cubic root of 28156936 is about 304.2251621365.

It can be divided in two parts, 28156 and 936, that added together give a palindrome (29092).

The spelling of 28156936 in words is "twenty-eight million, one hundred fifty-six thousand, nine hundred thirty-six".