855688 has 8 divisors (see below), whose sum is σ = 1604430. Its totient is φ = 427840.

The previous prime is 855683. The next prime is 855697. The reversal of 855688 is 886558.

It can be written as a sum of positive squares in only one way, i.e., 806404 + 49284 = 898^2 + 222^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 855688.

It is not an unprimeable number, because it can be changed into a prime (855683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53473 + ... + 53488.

2⁸⁵⁵⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

855688 is a deficient number, since it is larger than the sum of its proper divisors (748742).

855688 is a wasteful number, since it uses less digits than its factorization.

855688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106967 (or 106963 counting only the distinct ones).

The product of its digits is 76800, while the sum is 40.

The square root of 855688 is about 925.0340534272. The cubic root of 855688 is about 94.9376506860.

It can be divided in two parts, 8 and 55688, that added together give a square (55696 = 236²).

The spelling of 855688 in words is "eight hundred fifty-five thousand, six hundred eighty-eight".