28111146 has 32 divisors (see below), whose sum is σ = 67637760. Its totient is φ = 7608816.

The previous prime is 28111133. The next prime is 28111151. The reversal of 28111146 is 64111182.

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, 16816 + ... + 18411.

It is an arithmetic number, because the mean of its divisors is an integer number (2113680).

Almost surely, 2^28111146 is an apocalyptic number.

28111146 is an abundant number, since it is smaller than the sum of its proper divisors (39526614).

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

28111146 is a wasteful number, since it uses less digits than its factorization.

28111146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35258.

The product of its digits is 384, while the sum is 24.

The square root of 28111146 is about 5301.9945303631. The cubic root of 28111146 is about 304.0601580508.

The spelling of 28111146 in words is "twenty-eight million, one hundred eleven thousand, one hundred forty-six".