28943408 has 40 divisors (see below), whose sum is σ = 60756528. Its totient is φ = 13277952.

The previous prime is 28943389. The next prime is 28943443. The reversal of 28943408 is 80434982.

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 7 ways as a sum of consecutive naturals, for example, 46910 + ... + 47522.

Almost surely, 2^28943408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28943408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30378264).

28943408 is an abundant number, since it is smaller than the sum of its proper divisors (31813120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28943408 is a wasteful number, since it uses less digits than its factorization.

28943408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28943408 is about 5379.9078059015. The cubic root of 28943408 is about 307.0317035168.

The spelling of 28943408 in words is "twenty-eight million, nine hundred forty-three thousand, four hundred eight".