28963916 has 12 divisors (see below), whose sum is σ = 51152640. Its totient is φ = 14348880.

The previous prime is 28963873. The next prime is 28963919. The reversal of 28963916 is 61936982.

It is not an unprimeable number, because it can be changed into a prime (28963919) 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, 32780 + ... + 33651.

It is an arithmetic number, because the mean of its divisors is an integer number (4262720).

Almost surely, 2^28963916 is an apocalyptic number.

It is an amenable number.

28963916 is a deficient number, since it is larger than the sum of its proper divisors (22188724).

28963916 is a wasteful number, since it uses less digits than its factorization.

28963916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66544 (or 66542 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 28963916 is about 5381.8134490151. The cubic root of 28963916 is about 307.1042026917.

The spelling of 28963916 in words is "twenty-eight million, nine hundred sixty-three thousand, nine hundred sixteen".