856287728 has 10 divisors (see below), whose sum is σ = 1659057504. Its totient is φ = 428143856.

The previous prime is 856287713. The next prime is 856287749. The reversal of 856287728 is 827782658.

856287728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 856287728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26758976 + ... + 26759007.

Almost surely, 2^856287728 is an apocalyptic number.

It is an amenable number.

856287728 is a deficient number, since it is larger than the sum of its proper divisors (802769776).

856287728 is a wasteful number, since it uses less digits than its factorization.

856287728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53517991 (or 53517985 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 53.

The square root of 856287728 is about 29262.3944338121. The cubic root of 856287728 is about 949.5982522886.

The spelling of 856287728 in words is "eight hundred fifty-six million, two hundred eighty-seven thousand, seven hundred twenty-eight".