868772844 has 24 divisors (see below), whose sum is σ = 2252374320. Its totient is φ = 289590912.

The previous prime is 868772831. The next prime is 868772867. The reversal of 868772844 is 448277868.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4021989 + ... + 4022204.

It is an arithmetic number, because the mean of its divisors is an integer number (93848930).

Almost surely, 2^868772844 is an apocalyptic number.

It is an amenable number.

868772844 is an abundant number, since it is smaller than the sum of its proper divisors (1383601476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

868772844 is a wasteful number, since it uses less digits than its factorization.

868772844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044206 (or 8044198 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The square root of 868772844 is about 29474.9528243897. The cubic root of 868772844 is about 954.1912120186.

The spelling of 868772844 in words is "eight hundred sixty-eight million, seven hundred seventy-two thousand, eight hundred forty-four".