851471320 has 128 divisors (see below), whose sum is σ = 2384640000. Its totient is φ = 266982912.

The previous prime is 851471297. The next prime is 851471323. The reversal of 851471320 is 23174158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851471323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151521 + ... + 157039.

It is an arithmetic number, because the mean of its divisors is an integer number (18630000).

Almost surely, 2^851471320 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 851471320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1192320000).

851471320 is an abundant number, since it is smaller than the sum of its proper divisors (1533168680).

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

851471320 is a wasteful number, since it uses less digits than its factorization.

851471320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585 (or 5581 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 851471320 is about 29179.9814941682. The cubic root of 851471320 is about 947.8144847571.

The spelling of 851471320 in words is "eight hundred fifty-one million, four hundred seventy-one thousand, three hundred twenty".