858988 has 12 divisors (see below), whose sum is σ = 1618960. Its totient is φ = 396432.

The previous prime is 858961. The next prime is 858989. The reversal of 858988 is 889858.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (858989) 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, 8208 + ... + 8311.

2⁸⁵⁸⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

858988 is a deficient number, since it is larger than the sum of its proper divisors (759972).

858988 is a wasteful number, since it uses less digits than its factorization.

858988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16536 (or 16534 counting only the distinct ones).

The product of its digits is 184320, while the sum is 46.

The square root of 858988 is about 926.8160551048. The cubic root of 858988 is about 95.0595379328.

It can be divided in two parts, 8 and 58988, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 858988 in words is "eight hundred fifty-eight thousand, nine hundred eighty-eight".