28083456 has 144 divisors (see below), whose sum is σ = 88300800. Its totient is φ = 8773632.

The previous prime is 28083449. The next prime is 28083457. The reversal of 28083456 is 65438082.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28083456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28083457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117385 + ... + 117623.

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

Almost surely, 2^28083456 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 28083456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44150400).

28083456 is an abundant number, since it is smaller than the sum of its proper divisors (60217344).

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

28083456 is a wasteful number, since it uses less digits than its factorization.

28083456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28083456 is about 5299.3826055494. The cubic root of 28083456 is about 303.9602902887.

The spelling of 28083456 in words is "twenty-eight million, eighty-three thousand, four hundred fifty-six".