857128412 has 12 divisors (see below), whose sum is σ = 1714256880. Its totient is φ = 367340736.

The previous prime is 857128403. The next prime is 857128427. The reversal of 857128412 is 214821758.

857128412 is an admirable number.

It is a super-2 number, since 2×857128412² = 1469338229315283488, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 15305837 + ... + 15305892.

It is an arithmetic number, because the mean of its divisors is an integer number (142854740).

Almost surely, 2^857128412 is an apocalyptic number.

It is an amenable number.

857128412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

857128412 is a wasteful number, since it uses less digits than its factorization.

857128412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30611740 (or 30611738 counting only the distinct ones).

The product of its digits is 35840, while the sum is 38.

The square root of 857128412 is about 29276.7554896372. The cubic root of 857128412 is about 949.9089153669.

The spelling of 857128412 in words is "eight hundred fifty-seven million, one hundred twenty-eight thousand, four hundred twelve".