28943884 has 12 divisors (see below), whose sum is σ = 50840608. Its totient is φ = 14418000.

The previous prime is 28943861. The next prime is 28943899. The reversal of 28943884 is 48834982.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12267 + ... + 14434.

Almost surely, 2^28943884 is an apocalyptic number.

It is an amenable number.

28943884 is a deficient number, since it is larger than the sum of its proper divisors (21896724).

28943884 is a wasteful number, since it uses less digits than its factorization.

28943884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26976 (or 26974 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 28943884 is about 5379.9520443959. The cubic root of 28943884 is about 307.0333866437.

The spelling of 28943884 in words is "twenty-eight million, nine hundred forty-three thousand, eight hundred eighty-four".