28774816 has 48 divisors (see below), whose sum is σ = 68160960. Its totient is φ = 11681280.

The previous prime is 28774793. The next prime is 28774819. The reversal of 28774816 is 61847782.

It is not an unprimeable number, because it can be changed into a prime (28774819) by changing a digit.

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, 876 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (1420020).

Almost surely, 2^28774816 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 28774816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34080480).

28774816 is an abundant number, since it is smaller than the sum of its proper divisors (39386144).

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

28774816 is a wasteful number, since it uses less digits than its factorization.

28774816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6797 (or 6789 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 28774816 is about 5364.2162521658. The cubic root of 28774816 is about 306.4344008986.

The spelling of 28774816 in words is "twenty-eight million, seven hundred seventy-four thousand, eight hundred sixteen".