28418256 has 80 divisors (see below), whose sum is σ = 82286400. Its totient is φ = 9389952.

The previous prime is 28418239. The next prime is 28418263. The reversal of 28418256 is 65281482.

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 28418256.

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, 67615 + ... + 68033.

It is an arithmetic number, because the mean of its divisors is an integer number (1028580).

Almost surely, 2^28418256 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 28418256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41143200).

28418256 is an abundant number, since it is smaller than the sum of its proper divisors (53868144).

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

28418256 is a wasteful number, since it uses less digits than its factorization.

28418256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 581 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28418256 is about 5330.8776012961. The cubic root of 28418256 is about 305.1634204405.

28418256 divided by its sum of digits (36) gives a triangular number (789396 = T₁₂₅₆).

The spelling of 28418256 in words is "twenty-eight million, four hundred eighteen thousand, two hundred fifty-six".