871432020 has 216 divisors, whose sum is σ = 2851921800. Its totient is φ = 223388928.

The previous prime is 871431997. The next prime is 871432033. The reversal of 871432020 is 20234178.

It can be written as a sum of positive squares in 4 ways, for example, as 273042576 + 598389444 = 16524^2 + 24462^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 3805266 + ... + 3805494.

Almost surely, 2^871432020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 871432020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425960900).

871432020 is an abundant number, since it is smaller than the sum of its proper divisors (1980489780).

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

871432020 is a wasteful number, since it uses less digits than its factorization.

871432020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 871432020 is about 29520.0274390116. The cubic root of 871432020 is about 955.1637631136.

Adding to 871432020 its reverse (20234178), we get a palindrome (891666198).

The spelling of 871432020 in words is "eight hundred seventy-one million, four hundred thirty-two thousand, twenty".