857043680 has 48 divisors (see below), whose sum is σ = 2026612224. Its totient is φ = 342504960.

The previous prime is 857043653. The next prime is 857043683. The reversal of 857043680 is 86340758.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857043683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264470 + ... + 267690.

It is an arithmetic number, because the mean of its divisors is an integer number (42221088).

Almost surely, 2^857043680 is an apocalyptic number.

857043680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

857043680 is an abundant number, since it is smaller than the sum of its proper divisors (1169568544).

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

857043680 is a wasteful number, since it uses less digits than its factorization.

857043680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899 (or 4891 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 857043680 is about 29275.3083672914. The cubic root of 857043680 is about 949.8776130426.

The spelling of 857043680 in words is "eight hundred fifty-seven million, forty-three thousand, six hundred eighty".