856041889 has 8 divisors (see below), whose sum is σ = 861076640. Its totient is φ = 851021856.

The previous prime is 856041877. The next prime is 856041913. The reversal of 856041889 is 988140658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856041889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856041859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126022 + ... + 132640.

It is an arithmetic number, because the mean of its divisors is an integer number (107634580).

Almost surely, 2^856041889 is an apocalyptic number.

It is an amenable number.

856041889 is a deficient number, since it is larger than the sum of its proper divisors (5034751).

856041889 is a wasteful number, since it uses less digits than its factorization.

856041889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7359.

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 856041889 is about 29258.1935361703. The cubic root of 856041889 is about 949.5073674837.

The spelling of 856041889 in words is "eight hundred fifty-six million, forty-one thousand, eight hundred eighty-nine".