857231238 has 16 divisors (see below), whose sum is σ = 1731438576. Its totient is φ = 282914400.

The previous prime is 857231197. The next prime is 857231257. The reversal of 857231238 is 832132758.

It is a junction number, because it is equal to n+sod(n) for n = 857231196 and 857231205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706681 + ... + 707892.

It is an arithmetic number, because the mean of its divisors is an integer number (108214911).

Almost surely, 2^857231238 is an apocalyptic number.

857231238 is an abundant number, since it is smaller than the sum of its proper divisors (874207338).

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

857231238 is a wasteful number, since it uses less digits than its factorization.

857231238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414679.

The product of its digits is 80640, while the sum is 39.

The square root of 857231238 is about 29278.5115400356. The cubic root of 857231238 is about 949.9468993404.

The spelling of 857231238 in words is "eight hundred fifty-seven million, two hundred thirty-one thousand, two hundred thirty-eight".