857008540 has 12 divisors (see below), whose sum is σ = 1799717976. Its totient is φ = 342803408.

The previous prime is 857008519. The next prime is 857008561. The reversal of 857008540 is 45800758.

857008540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (857008519) and next prime (857008561).

It is a self number, because there is not a number n which added to its sum of digits gives 857008540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21425194 + ... + 21425233.

It is an arithmetic number, because the mean of its divisors is an integer number (149976498).

Almost surely, 2^857008540 is an apocalyptic number.

It is an amenable number.

857008540 is an abundant number, since it is smaller than the sum of its proper divisors (942709436).

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

857008540 is a wasteful number, since it uses less digits than its factorization.

857008540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42850436 (or 42850434 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 857008540 is about 29274.7081966670. The cubic root of 857008540 is about 949.8646307578.

The spelling of 857008540 in words is "eight hundred fifty-seven million, eight thousand, five hundred forty".