871655436 has 72 divisors (see below), whose sum is σ = 2284857120. Its totient is φ = 279853056.

The previous prime is 871655429. The next prime is 871655441. The reversal of 871655436 is 634556178.

871655436 is a `hidden beast` number, since 87 + 16 + 554 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 871655391 and 871655400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 601665 + ... + 603111.

Almost surely, 2^871655436 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 871655436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142428560).

871655436 is an abundant number, since it is smaller than the sum of its proper divisors (1413201684).

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

871655436 is a wasteful number, since it uses less digits than its factorization.

871655436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 2058 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 871655436 is about 29523.8113393241. The cubic root of 871655436 is about 955.2453837977.

The spelling of 871655436 in words is "eight hundred seventy-one million, six hundred fifty-five thousand, four hundred thirty-six".