28229376 has 144 divisors (see below), whose sum is σ = 88300800. Its totient is φ = 7839744.

The previous prime is 28229363. The next prime is 28229381. The reversal of 28229376 is 67392282.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 317140 + ... + 317228.

It is an arithmetic number, because the mean of its divisors is an integer number (613200).

Almost surely, 2^28229376 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 28229376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44150400).

28229376 is an abundant number, since it is smaller than the sum of its proper divisors (60071424).

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

28229376 is an equidigital number, since it uses as much as digits as its factorization.

28229376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 160 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 28229376 is about 5313.1324094173. The cubic root of 28229376 is about 304.4858344202.

The spelling of 28229376 in words is "twenty-eight million, two hundred twenty-nine thousand, three hundred seventy-six".