858996 has 36 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 282384.

The previous prime is 858989. The next prime is 858997. The reversal of 858996 is 699858.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858997) 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 11 ways as a sum of consecutive naturals, for example, 3741 + ... + 3963.

It is an arithmetic number, because the mean of its divisors is an integer number (61152).

2⁸⁵⁸⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

858996 is an abundant number, since it is smaller than the sum of its proper divisors (1342476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

858996 is a wasteful number, since it uses less digits than its factorization.

858996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 335 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 858996 is about 926.8203709457. The cubic root of 858996 is about 95.0598330374.

It can be divided in two parts, 85899 and 6, that added together give a triangular number (85905 = T₄₁₄).

The spelling of 858996 in words is "eight hundred fifty-eight thousand, nine hundred ninety-six".