872781124 has 12 divisors (see below), whose sum is σ = 1530113004. Its totient is φ = 435605984.

The previous prime is 872781121. The next prime is 872781137. The reversal of 872781124 is 421187278.

It can be written as a sum of positive squares in 2 ways, for example, as 139996224 + 732784900 = 11832^2 + 27070^2 .

It is not an unprimeable number, because it can be changed into a prime (872781121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193639 + ... + 198094.

It is an arithmetic number, because the mean of its divisors is an integer number (127509417).

Almost surely, 2^872781124 is an apocalyptic number.

It is an amenable number.

872781124 is a deficient number, since it is larger than the sum of its proper divisors (657331880).

872781124 is a wasteful number, since it uses less digits than its factorization.

872781124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392294 (or 392292 counting only the distinct ones).

The product of its digits is 50176, while the sum is 40.

The square root of 872781124 is about 29542.8692580799. The cubic root of 872781124 is about 955.6564199539.

The spelling of 872781124 in words is "eight hundred seventy-two million, seven hundred eighty-one thousand, one hundred twenty-four".