28618256 has 40 divisors (see below), whose sum is σ = 60918720. Its totient is φ = 12963456.

The previous prime is 28618231. The next prime is 28618297. The reversal of 28618256 is 65281682.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4946 + ... + 9038.

It is an arithmetic number, because the mean of its divisors is an integer number (1522968).

Almost surely, 2^28618256 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 28618256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30459360).

28618256 is an abundant number, since it is smaller than the sum of its proper divisors (32300464).

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

28618256 is a wasteful number, since it uses less digits than its factorization.

28618256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143 (or 4137 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 28618256 is about 5349.6033497821. The cubic root of 28618256 is about 305.8776334462.

The spelling of 28618256 in words is "twenty-eight million, six hundred eighteen thousand, two hundred fifty-six".