28464256 has 64 divisors (see below), whose sum is σ = 61102080. Its totient is φ = 13160448.

The previous prime is 28464221. The next prime is 28464259. The reversal of 28464256 is 65246482.

28464256 = 409² + 410² + ... + 535².

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28464259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224065 + ... + 224191.

It is an arithmetic number, because the mean of its divisors is an integer number (954720).

Almost surely, 2^28464256 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 28464256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30551040).

28464256 is an abundant number, since it is smaller than the sum of its proper divisors (32637824).

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

28464256 is a wasteful number, since it uses less digits than its factorization.

28464256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 249 counting only the distinct ones).

The product of its digits is 92160, while the sum is 37.

The square root of 28464256 is about 5335.1903433711. The cubic root of 28464256 is about 305.3279854308.

The spelling of 28464256 in words is "twenty-eight million, four hundred sixty-four thousand, two hundred fifty-six".