28238976 has 64 divisors (see below), whose sum is σ = 83354400. Its totient is φ = 9411840.

The previous prime is 28238971. The next prime is 28238999. The reversal of 28238976 is 67983282.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (28238971) 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, 630 + ... + 7541.

Almost surely, 2^28238976 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 28238976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41677200).

28238976 is an abundant number, since it is smaller than the sum of its proper divisors (55115424).

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

28238976 is an equidigital number, since it uses as much as digits as its factorization.

28238976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194 (or 8176 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28238976 is about 5314.0357544902. The cubic root of 28238976 is about 304.5203461374.

The spelling of 28238976 in words is "twenty-eight million, two hundred thirty-eight thousand, nine hundred seventy-six".