857641684 has 12 divisors (see below), whose sum is σ = 1579866400. Its totient is φ = 406251288.

The previous prime is 857641669. The next prime is 857641717. The reversal of 857641684 is 486146758.

857641684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (49) 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, 5642304 + ... + 5642455.

Almost surely, 2^857641684 is an apocalyptic number.

It is an amenable number.

857641684 is a deficient number, since it is larger than the sum of its proper divisors (722224716).

857641684 is a wasteful number, since it uses less digits than its factorization.

857641684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11284782 (or 11284780 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 857641684 is about 29285.5200397739. The cubic root of 857641684 is about 950.0984880348.

The spelling of 857641684 in words is "eight hundred fifty-seven million, six hundred forty-one thousand, six hundred eighty-four".