861878344 has 32 divisors (see below), whose sum is σ = 1632169440. Its totient is φ = 426649600.

The previous prime is 861878341. The next prime is 861878351. The reversal of 861878344 is 443878168.

It is a happy number.

861878344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (861878341) 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, 671127 + ... + 672409.

It is an arithmetic number, because the mean of its divisors is an integer number (51005295).

Almost surely, 2^861878344 is an apocalyptic number.

It is an amenable number.

861878344 is a deficient number, since it is larger than the sum of its proper divisors (770291096).

861878344 is a wasteful number, since it uses less digits than its factorization.

861878344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2057 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 861878344 is about 29357.7646287997. The cubic root of 861878344 is about 951.6603812943.

The spelling of 861878344 in words is "eight hundred sixty-one million, eight hundred seventy-eight thousand, three hundred forty-four".