28144750 has 32 divisors (see below), whose sum is σ = 53247168. Its totient is φ = 11138400.

The previous prime is 28144733. The next prime is 28144763. The reversal of 28144750 is 5744182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25204 + ... + 26296.

It is an arithmetic number, because the mean of its divisors is an integer number (1663974).

Almost surely, 2^28144750 is an apocalyptic number.

28144750 is a deficient number, since it is larger than the sum of its proper divisors (25102418).

28144750 is a wasteful number, since it uses less digits than its factorization.

28144750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1203 counting only the distinct ones).

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

The square root of 28144750 is about 5305.1625799781. The cubic root of 28144750 is about 304.1812674128.

The spelling of 28144750 in words is "twenty-eight million, one hundred forty-four thousand, seven hundred fifty".