873318644 has 24 divisors (see below), whose sum is σ = 1724738400. Its totient is φ = 383274080.

The previous prime is 873318601. The next prime is 873318653. The reversal of 873318644 is 446813378.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 873318595 and 873318604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340934 + ... + 343485.

It is an arithmetic number, because the mean of its divisors is an integer number (71864100).

Almost surely, 2^873318644 is an apocalyptic number.

It is an amenable number.

873318644 is a deficient number, since it is larger than the sum of its proper divisors (851419756).

873318644 is a wasteful number, since it uses less digits than its factorization.

873318644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684463 (or 684461 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 873318644 is about 29551.9651461624. The cubic root of 873318644 is about 955.8525665045.

The spelling of 873318644 in words is "eight hundred seventy-three million, three hundred eighteen thousand, six hundred forty-four".