28928816 has 30 divisors (see below), whose sum is σ = 65202300. Its totient is φ = 12397728.

The previous prime is 28928813. The next prime is 28928833. The reversal of 28928816 is 61882982.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28928813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17666 + ... + 19233.

It is an arithmetic number, because the mean of its divisors is an integer number (2173410).

Almost surely, 2^28928816 is an apocalyptic number.

It is an amenable number.

28928816 is an abundant number, since it is smaller than the sum of its proper divisors (36273484).

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

28928816 is a wasteful number, since it uses less digits than its factorization.

28928816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36921 (or 36908 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 28928816 is about 5378.5514778609. The cubic root of 28928816 is about 306.9800975260.

The spelling of 28928816 in words is "twenty-eight million, nine hundred twenty-eight thousand, eight hundred sixteen".