28816816 has 20 divisors (see below), whose sum is σ = 63808912. Its totient is φ = 12350016.

The previous prime is 28816793. The next prime is 28816817. The reversal of 28816816 is 61861882.

It is not an unprimeable number, because it can be changed into a prime (28816817) 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, 128535 + ... + 128758.

Almost surely, 2^28816816 is an apocalyptic number.

It is an amenable number.

28816816 is an abundant number, since it is smaller than the sum of its proper divisors (34992096).

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

28816816 is a wasteful number, since it uses less digits than its factorization.

28816816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257308 (or 257302 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 28816816 is about 5368.1296556622. The cubic root of 28816816 is about 306.5834199583.

The spelling of 28816816 in words is "twenty-eight million, eight hundred sixteen thousand, eight hundred sixteen".