857928645 has 64 divisors (see below), whose sum is σ = 1759296000. Its totient is φ = 388551168.

The previous prime is 857928623. The next prime is 857928653. The reversal of 857928645 is 546829758.

857928645 is a `hidden beast` number, since 8 + 579 + 2 + 8 + 64 + 5 = 666.

It is not a de Polignac number, because 857928645 - 2⁹ = 857928133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857928591 and 857928600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98841 + ... + 107169.

It is an arithmetic number, because the mean of its divisors is an integer number (27489000).

Almost surely, 2^857928645 is an apocalyptic number.

It is an amenable number.

857928645 is an abundant number, since it is smaller than the sum of its proper divisors (901367355).

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

857928645 is a wasteful number, since it uses less digits than its factorization.

857928645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8459 (or 8453 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 857928645 is about 29290.4189966617. The cubic root of 857928645 is about 950.2044416885.

The spelling of 857928645 in words is "eight hundred fifty-seven million, nine hundred twenty-eight thousand, six hundred forty-five".