856380 has 48 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 195648.

The previous prime is 856369. The next prime is 856381. The reversal of 856380 is 83658.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856381) by changing a digit.

856380 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 15 ways as a sum of consecutive naturals, for example, 600 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (57120).

2⁸⁵⁶³⁸⁰ is an apocalyptic number.

It is an amenable number.

856380 is an abundant number, since it is smaller than the sum of its proper divisors (1885380).

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

856380 is a wasteful number, since it uses less digits than its factorization.

856380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2056 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 856380 is about 925.4080181196. The cubic root of 856380 is about 94.9632360054.

The spelling of 856380 in words is "eight hundred fifty-six thousand, three hundred eighty".