857568132 has 18 divisors (see below), whose sum is σ = 2167741758. Its totient is φ = 285856032.

The previous prime is 857568121. The next prime is 857568139. The reversal of 857568132 is 231865758.

857568132 is a `hidden beast` number, since 8 + 57 + 568 + 1 + 32 = 666.

857568132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 639887616 + 217680516 = 25296^2 + 14754^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (857568139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11910633 + ... + 11910704.

Almost surely, 2^857568132 is an apocalyptic number.

It is an amenable number.

857568132 is an abundant number, since it is smaller than the sum of its proper divisors (1310173626).

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

857568132 is a wasteful number, since it uses less digits than its factorization.

857568132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23821347 (or 23821342 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 857568132 is about 29284.2642386658. The cubic root of 857568132 is about 950.0713268699.

The spelling of 857568132 in words is "eight hundred fifty-seven million, five hundred sixty-eight thousand, one hundred thirty-two".