28224480 has 96 divisors (see below), whose sum is σ = 89800704. Its totient is φ = 7451136.

The previous prime is 28224433. The next prime is 28224529. The reversal of 28224480 is 8442282.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60729 + ... + 61191.

It is an arithmetic number, because the mean of its divisors is an integer number (935424).

Almost surely, 2^28224480 is an apocalyptic number.

28224480 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 28224480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44900352).

28224480 is an abundant number, since it is smaller than the sum of its proper divisors (61576224).

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

28224480 is a wasteful number, since it uses less digits than its factorization.

28224480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 600 counting only the distinct ones).

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

The square root of 28224480 is about 5312.6716442860. The cubic root of 28224480 is about 304.4682304316.

The spelling of 28224480 in words is "twenty-eight million, two hundred twenty-four thousand, four hundred eighty".