28044480 has 112 divisors (see below), whose sum is σ = 90123264. Its totient is φ = 7388160.

The previous prime is 28044461. The next prime is 28044493. The reversal of 28044480 is 8444082.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 125649 + ... + 125871.

It is an arithmetic number, because the mean of its divisors is an integer number (804672).

Almost surely, 2^28044480 is an apocalyptic number.

28044480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28044480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45061632).

28044480 is an abundant number, since it is smaller than the sum of its proper divisors (62078784).

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

28044480 is a wasteful number, since it uses less digits than its factorization.

28044480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 364 counting only the distinct ones).

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

The square root of 28044480 is about 5295.7039192160. The cubic root of 28044480 is about 303.8196067341.

The spelling of 28044480 in words is "twenty-eight million, forty-four thousand, four hundred eighty".