28719872 has 36 divisors (see below), whose sum is σ = 58683240. Its totient is φ = 14020608.

The previous prime is 28719871. The next prime is 28719931. The reversal of 28719872 is 27891782.

It is not an unprimeable number, because it can be changed into a prime (28719871) 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 3 ways as a sum of consecutive naturals, for example, 9704 + ... + 12312.

It is an arithmetic number, because the mean of its divisors is an integer number (1630090).

Almost surely, 2^28719872 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 28719872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29341620).

28719872 is an abundant number, since it is smaller than the sum of its proper divisors (29963368).

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

28719872 is an equidigital number, since it uses as much as digits as its factorization.

28719872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668 (or 2654 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 28719872 is about 5359.0924604825. The cubic root of 28719872 is about 306.2392364952.

The spelling of 28719872 in words is "twenty-eight million, seven hundred nineteen thousand, eight hundred seventy-two".