28173936 has 80 divisors (see below), whose sum is σ = 84423168. Its totient is φ = 7929600.

The previous prime is 28173931. The next prime is 28173949. The reversal of 28173936 is 63937182.

It is a junction number, because it is equal to n+sod(n) for n = 28173894 and 28173903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28173931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23266 + ... + 24446.

Almost surely, 2^28173936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28173936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42211584).

28173936 is an abundant number, since it is smaller than the sum of its proper divisors (56249232).

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

28173936 is a wasteful number, since it uses less digits than its factorization.

28173936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1264 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 28173936 is about 5307.9125840579. The cubic root of 28173936 is about 304.2863760325.

The spelling of 28173936 in words is "twenty-eight million, one hundred seventy-three thousand, nine hundred thirty-six".