855600380 has 12 divisors (see below), whose sum is σ = 1796760840. Its totient is φ = 342240144.

The previous prime is 855600377. The next prime is 855600401. The reversal of 855600380 is 83006558.

It is a super-2 number, since 2×855600380² = 1464104020512288800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 855600380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21389990 + ... + 21390029.

It is an arithmetic number, because the mean of its divisors is an integer number (149730070).

Almost surely, 2^855600380 is an apocalyptic number.

It is an amenable number.

855600380 is an abundant number, since it is smaller than the sum of its proper divisors (941160460).

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

855600380 is a wasteful number, since it uses less digits than its factorization.

855600380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42780028 (or 42780026 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 855600380 is about 29250.6475142004. The cubic root of 855600380 is about 949.3441012754.

The spelling of 855600380 in words is "eight hundred fifty-five million, six hundred thousand, three hundred eighty".