28158246 has 32 divisors (see below), whose sum is σ = 64735200. Its totient is φ = 9061920.

The previous prime is 28158191. The next prime is 28158257. The reversal of 28158246 is 64285182.

It is a self number, because there is not a number n which added to its sum of digits gives 28158246.

It is a congruent 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, 7425 + ... + 10556.

It is an arithmetic number, because the mean of its divisors is an integer number (2022975).

Almost surely, 2^28158246 is an apocalyptic number.

28158246 is an abundant number, since it is smaller than the sum of its proper divisors (36576954).

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

28158246 is a wasteful number, since it uses less digits than its factorization.

28158246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18021 (or 18015 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28158246 is about 5306.4343960893. The cubic root of 28158246 is about 304.2298800833.

The spelling of 28158246 in words is "twenty-eight million, one hundred fifty-eight thousand, two hundred forty-six".