870681646 has 8 divisors (see below), whose sum is σ = 1311879744. Its totient is φ = 433388400.

The previous prime is 870681641. The next prime is 870681659. The reversal of 870681646 is 646186078.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 870681596 and 870681605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870681641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975655 + ... + 976546.

It is an arithmetic number, because the mean of its divisors is an integer number (163984968).

Almost surely, 2^870681646 is an apocalyptic number.

870681646 is a deficient number, since it is larger than the sum of its proper divisors (441198098).

870681646 is a wasteful number, since it uses less digits than its factorization.

870681646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952426.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 870681646 is about 29507.3151269308. The cubic root of 870681646 is about 954.8895264332.

The spelling of 870681646 in words is "eight hundred seventy million, six hundred eighty-one thousand, six hundred forty-six".