8256728 has 16 divisors (see below), whose sum is σ = 15528480. Its totient is φ = 4115808.

The previous prime is 8256727. The next prime is 8256749. The reversal of 8256728 is 8276528.

It is a d-powerful number, because it can be written as 8⁴ + 2⁴ + 5⁸ + 6 + 7⁸ + 2⁵ + 8⁷ .

It is a junction number, because it is equal to n+sod(n) for n = 8256691 and 8256700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8256727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601 + ... + 4367.

It is an arithmetic number, because the mean of its divisors is an integer number (970530).

Almost surely, 2^8256728 is an apocalyptic number.

It is an amenable number.

8256728 is a deficient number, since it is larger than the sum of its proper divisors (7271752).

8256728 is a wasteful number, since it uses less digits than its factorization.

8256728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146 (or 3142 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 8256728 is about 2873.4522790539. The cubic root of 8256728 is about 202.1169143141.

The spelling of 8256728 in words is "eight million, two hundred fifty-six thousand, seven hundred twenty-eight".