28448004 has 72 divisors (see below), whose sum is σ = 76057408. Its totient is φ = 8225280.

The previous prime is 28447981. The next prime is 28448011. The reversal of 28448004 is 40084482.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44769 + ... + 45399.

Almost surely, 2^28448004 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 28448004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38028704).

28448004 is an abundant number, since it is smaller than the sum of its proper divisors (47609404).

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

28448004 is a wasteful number, since it uses less digits than its factorization.

28448004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 28448004 is about 5333.6670312272. The cubic root of 28448004 is about 305.2698641725.

The spelling of 28448004 in words is "twenty-eight million, four hundred forty-eight thousand, four".