28143650 has 24 divisors (see below), whose sum is σ = 52874964. Its totient is φ = 11144000.

The previous prime is 28143641. The next prime is 28143679. The reversal of 28143650 is 5634182.

It can be written as a sum of positive squares in 6 ways, for example, as 10259209 + 17884441 = 3203^2 + 4229^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2264 + ... + 7836.

Almost surely, 2^28143650 is an apocalyptic number.

28143650 is a deficient number, since it is larger than the sum of its proper divisors (24731314).

28143650 is a wasteful number, since it uses less digits than its factorization.

28143650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5686 (or 5681 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28143650 is about 5305.0589063648. The cubic root of 28143650 is about 304.1773045215.

The spelling of 28143650 in words is "twenty-eight million, one hundred forty-three thousand, six hundred fifty".