28144075 has 6 divisors (see below), whose sum is σ = 34898684. Its totient is φ = 22515240.

The previous prime is 28144057. The next prime is 28144079. The reversal of 28144075 is 57044182.

It is not a de Polignac number, because 28144075 - 2⁵ = 28144043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28144079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562857 + ... + 562906.

Almost surely, 2^28144075 is an apocalyptic number.

28144075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28144075 is a deficient number, since it is larger than the sum of its proper divisors (6754609).

28144075 is a wasteful number, since it uses less digits than its factorization.

28144075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125773 (or 1125768 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 28144075 is about 5305.0989623192. The cubic root of 28144075 is about 304.1788356508.

It can be divided in two parts, 2814 and 4075, that added together give a square (6889 = 83²).

The spelling of 28144075 in words is "twenty-eight million, one hundred forty-four thousand, seventy-five".