851039280 has 480 divisors, whose sum is σ = 3639767040. Its totient is φ = 173352960.

The previous prime is 851039269. The next prime is 851039327. The reversal of 851039280 is 82930158.

It is a super-2 number, since 2×851039280² = 1448535712205836800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2030911 + ... + 2031329.

It is an arithmetic number, because the mean of its divisors is an integer number (7582848).

Almost surely, 2^851039280 is an apocalyptic number.

851039280 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 851039280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1819883520).

851039280 is an abundant number, since it is smaller than the sum of its proper divisors (2788727760).

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

851039280 is a wasteful number, since it uses less digits than its factorization.

851039280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 851039280 is about 29172.5775343901. The cubic root of 851039280 is about 947.6541493317.

The spelling of 851039280 in words is "eight hundred fifty-one million, thirty-nine thousand, two hundred eighty".