871231940 has 12 divisors (see below), whose sum is σ = 1829587116. Its totient is φ = 348492768.

The previous prime is 871231883. The next prime is 871231957. The reversal of 871231940 is 49132178.

It can be written as a sum of positive squares in 2 ways, for example, as 364351744 + 506880196 = 19088^2 + 22514^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 871231940.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21780779 + ... + 21780818.

It is an arithmetic number, because the mean of its divisors is an integer number (152465593).

Almost surely, 2^871231940 is an apocalyptic number.

It is an amenable number.

871231940 is an abundant number, since it is smaller than the sum of its proper divisors (958355176).

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

871231940 is a wasteful number, since it uses less digits than its factorization.

871231940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43561606 (or 43561604 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 871231940 is about 29516.6383587291. The cubic root of 871231940 is about 955.0906559408.

The spelling of 871231940 in words is "eight hundred seventy-one million, two hundred thirty-one thousand, nine hundred forty".