28185396 has 24 divisors (see below), whose sum is σ = 68625984. Its totient is φ = 8986560.

The previous prime is 28185349. The next prime is 28185401. The reversal of 28185396 is 69358182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50785 + ... + 51336.

It is an arithmetic number, because the mean of its divisors is an integer number (2859416).

Almost surely, 2^28185396 is an apocalyptic number.

It is an amenable number.

28185396 is an abundant number, since it is smaller than the sum of its proper divisors (40440588).

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

28185396 is a wasteful number, since it uses less digits than its factorization.

28185396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102151 (or 102149 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 28185396 is about 5308.9919947199. The cubic root of 28185396 is about 304.3276275066.

The spelling of 28185396 in words is "twenty-eight million, one hundred eighty-five thousand, three hundred ninety-six".