28943144 has 16 divisors (see below), whose sum is σ = 54368820. Its totient is φ = 14444800.

The previous prime is 28943087. The next prime is 28943147. The reversal of 28943144 is 44134982.

It can be written as a sum of positive squares in 2 ways, for example, as 28494244 + 448900 = 5338^2 + 670^2 .

It is not an unprimeable number, because it can be changed into a prime (28943147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1694 + ... + 7794.

Almost surely, 2^28943144 is an apocalyptic number.

It is an amenable number.

28943144 is a deficient number, since it is larger than the sum of its proper divisors (25425676).

28943144 is a wasteful number, since it uses less digits than its factorization.

28943144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700 (or 6696 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 28943144 is about 5379.8832701091. The cubic root of 28943144 is about 307.0307700098.

The spelling of 28943144 in words is "twenty-eight million, nine hundred forty-three thousand, one hundred forty-four".