851339280 has 160 divisors (see below), whose sum is σ = 2897814528. Its totient is φ = 205043200.

The previous prime is 851339239. The next prime is 851339287. The reversal of 851339280 is 82933158.

It is not an unprimeable number, because it can be changed into a prime (851339287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439915 + ... + 441845.

Almost surely, 2^851339280 is an apocalyptic number.

851339280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851339280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448907264).

851339280 is an abundant number, since it is smaller than the sum of its proper divisors (2046475248).

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

851339280 is a wasteful number, since it uses less digits than its factorization.

851339280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 851339280 is about 29177.7188964456. The cubic root of 851339280 is about 947.7654888245.

The spelling of 851339280 in words is "eight hundred fifty-one million, three hundred thirty-nine thousand, two hundred eighty".