871894620 has 144 divisors (see below), whose sum is σ = 2695492800. Its totient is φ = 228096000.

The previous prime is 871894619. The next prime is 871894663. The reversal of 871894620 is 26498178.

871894620 is a `hidden beast` number, since 8 + 7 + 18 + 9 + 4 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3617700 + ... + 3617940.

It is an arithmetic number, because the mean of its divisors is an integer number (18718700).

Almost surely, 2^871894620 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 871894620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347746400).

871894620 is an abundant number, since it is smaller than the sum of its proper divisors (1823598180).

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

871894620 is a wasteful number, since it uses less digits than its factorization.

871894620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 871894620 is about 29527.8617580075. The cubic root of 871894620 is about 955.3327495569.

It can be divided in two parts, 87189 and 4620, that added together give a square (91809 = 303²).

The spelling of 871894620 in words is "eight hundred seventy-one million, eight hundred ninety-four thousand, six hundred twenty".