857540256 has 96 divisors (see below), whose sum is σ = 2318658048. Its totient is φ = 277340160.

The previous prime is 857540227. The next prime is 857540263. The reversal of 857540256 is 652045758.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877240 + ... + 878216.

It is an arithmetic number, because the mean of its divisors is an integer number (24152688).

Almost surely, 2^857540256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857540256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159329024).

857540256 is an abundant number, since it is smaller than the sum of its proper divisors (1461117792).

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

857540256 is a wasteful number, since it uses less digits than its factorization.

857540256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The square root of 857540256 is about 29283.7882795242. The cubic root of 857540256 is about 950.0610324593.

The spelling of 857540256 in words is "eight hundred fifty-seven million, five hundred forty thousand, two hundred fifty-six".