858980 has 24 divisors (see below), whose sum is σ = 1867320. Its totient is φ = 331520.

The previous prime is 858961. The next prime is 858989. The reversal of 858980 is 89858.

858980 = T₅₉ + T₆₀ + ... + T₁₇₄.

858980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 73984 + 784996 = 272^2 + 886^2 .

It is not an unprimeable number, because it can be changed into a prime (858989) by changing a digit.

858980 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 7 ways as a sum of consecutive naturals, for example, 161 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (77805).

2⁸⁵⁸⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

858980 is an abundant number, since it is smaller than the sum of its proper divisors (1008340).

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

858980 is a wasteful number, since it uses less digits than its factorization.

858980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 858980 is about 926.8117392437. The cubic root of 858980 is about 95.0592428264.

The spelling of 858980 in words is "eight hundred fifty-eight thousand, nine hundred eighty".