857142936 has 96 divisors (see below), whose sum is σ = 2507232000. Its totient is φ = 262973952.

The previous prime is 857142931. The next prime is 857142947. The reversal of 857142936 is 639241758.

857142936 is a `hidden beast` number, since 8 + 571 + 42 + 9 + 36 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 857142891 and 857142900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857142931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 381705 + ... + 383943.

It is an arithmetic number, because the mean of its divisors is an integer number (26117000).

Almost surely, 2^857142936 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 857142936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253616000).

857142936 is an abundant number, since it is smaller than the sum of its proper divisors (1650089064).

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

857142936 is a wasteful number, since it uses less digits than its factorization.

857142936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673 (or 2666 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 857142936 is about 29277.0035351981. The cubic root of 857142936 is about 949.9142807237.

The spelling of 857142936 in words is "eight hundred fifty-seven million, one hundred forty-two thousand, nine hundred thirty-six".