857943644 has 6 divisors (see below), whose sum is σ = 1501401384. Its totient is φ = 428971820.

The previous prime is 857943617. The next prime is 857943673. The reversal of 857943644 is 446349758.

857943644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 857943592 and 857943601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107242952 + ... + 107242959.

It is an arithmetic number, because the mean of its divisors is an integer number (250233564).

Almost surely, 2^857943644 is an apocalyptic number.

It is an amenable number.

857943644 is a deficient number, since it is larger than the sum of its proper divisors (643457740).

857943644 is a wasteful number, since it uses less digits than its factorization.

857943644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214485915 (or 214485913 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The square root of 857943644 is about 29290.6750348981. The cubic root of 857943644 is about 950.2099790695.

The spelling of 857943644 in words is "eight hundred fifty-seven million, nine hundred forty-three thousand, six hundred forty-four".