857145628 has 12 divisors (see below), whose sum is σ = 1525429080. Its totient is φ = 421308752.

The previous prime is 857145557. The next prime is 857145643. The reversal of 857145628 is 826541758.

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, 1815751 + ... + 1816222.

It is an arithmetic number, because the mean of its divisors is an integer number (127119090).

Almost surely, 2^857145628 is an apocalyptic number.

It is an amenable number.

857145628 is a deficient number, since it is larger than the sum of its proper divisors (668283452).

857145628 is a wasteful number, since it uses less digits than its factorization.

857145628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632036 (or 3632034 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The square root of 857145628 is about 29277.0495098123. The cubic root of 857145628 is about 949.9152751773.

The spelling of 857145628 in words is "eight hundred fifty-seven million, one hundred forty-five thousand, six hundred twenty-eight".