857000238 has 32 divisors (see below), whose sum is σ = 1735776000. Its totient is φ = 282051840.

The previous prime is 857000233. The next prime is 857000279. The reversal of 857000238 is 832000758.

It is a junction number, because it is equal to n+sod(n) for n = 857000199 and 857000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857000233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284263 + ... + 287261.

It is an arithmetic number, because the mean of its divisors is an integer number (54243000).

Almost surely, 2^857000238 is an apocalyptic number.

857000238 is an abundant number, since it is smaller than the sum of its proper divisors (878775762).

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

857000238 is a wasteful number, since it uses less digits than its factorization.

857000238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 857000238 is about 29274.5664015712. The cubic root of 857000238 is about 949.8615635765.

The spelling of 857000238 in words is "eight hundred fifty-seven million, two hundred thirty-eight", and thus it is an aban number.