851328420 has 48 divisors (see below), whose sum is σ = 2388216768. Its totient is φ = 226592640.

The previous prime is 851328377. The next prime is 851328433. The reversal of 851328420 is 24823158.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19347 + ... + 45573.

It is an arithmetic number, because the mean of its divisors is an integer number (49754516).

Almost surely, 2^851328420 is an apocalyptic number.

It is an amenable number.

851328420 is an abundant number, since it is smaller than the sum of its proper divisors (1536888348).

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

851328420 is a wasteful number, since it uses less digits than its factorization.

851328420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26780 (or 26778 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 851328420 is about 29177.5327949434. The cubic root of 851328420 is about 947.7614587912.

The spelling of 851328420 in words is "eight hundred fifty-one million, three hundred twenty-eight thousand, four hundred twenty".