8742856 has 16 divisors (see below), whose sum is σ = 16671600. Its totient is φ = 4297104.

The previous prime is 8742847. The next prime is 8742857. The reversal of 8742856 is 6582478.

It is not an unprimeable number, because it can be changed into a prime (8742857) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8790 + ... + 9733.

It is an arithmetic number, because the mean of its divisors is an integer number (1041975).

Almost surely, 2^8742856 is an apocalyptic number.

It is an amenable number.

8742856 is a deficient number, since it is larger than the sum of its proper divisors (7928744).

8742856 is a wasteful number, since it uses less digits than its factorization.

8742856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18588 (or 18584 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 8742856 is about 2956.8320885705. The cubic root of 8742856 is about 206.0081688406.

The spelling of 8742856 in words is "eight million, seven hundred forty-two thousand, eight hundred fifty-six".