856988 has 12 divisors (see below), whose sum is σ = 1636152. Its totient is φ = 389520.

The previous prime is 856969. The next prime is 856993. The reversal of 856988 is 889658.

856988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 19477 = 856988 / (8 + 5 + 6 + 9 + 8 + 8).

It is a congruent number.

It is an unprimeable number.

856988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9695 + ... + 9782.

It is an arithmetic number, because the mean of its divisors is an integer number (136346).

2⁸⁵⁶⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

856988 is a deficient number, since it is larger than the sum of its proper divisors (779164).

856988 is a wasteful number, since it uses less digits than its factorization.

856988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19492 (or 19490 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 856988 is about 925.7364635791. The cubic root of 856988 is about 94.9857042200.

It can be divided in two parts, 85698 and 8, that multiplied together give a square (685584 = 828²).

The spelling of 856988 in words is "eight hundred fifty-six thousand, nine hundred eighty-eight".