872139384 has 24 divisors (see below), whose sum is σ = 2362044360. Its totient is φ = 290713104.

The previous prime is 872139383. The next prime is 872139403. The reversal of 872139384 is 483931278.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872139383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6056452 + ... + 6056595.

It is an arithmetic number, because the mean of its divisors is an integer number (98418515).

Almost surely, 2^872139384 is an apocalyptic number.

It is an amenable number.

872139384 is an abundant number, since it is smaller than the sum of its proper divisors (1489904976).

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

872139384 is a wasteful number, since it uses less digits than its factorization.

872139384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12113059 (or 12113052 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 872139384 is about 29532.0060950827. The cubic root of 872139384 is about 955.4221369600.

The spelling of 872139384 in words is "eight hundred seventy-two million, one hundred thirty-nine thousand, three hundred eighty-four".