2851280 has 40 divisors (see below), whose sum is σ = 6863400. Its totient is φ = 1100288.

The previous prime is 2851267. The next prime is 2851313. The reversal of 2851280 is 821582.

It can be written as a sum of positive squares in 4 ways, for example, as 1098304 + 1752976 = 1048^2 + 1324^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1706 + ... + 2934.

It is an arithmetic number, because the mean of its divisors is an integer number (171585).

2^2851280 is an apocalyptic number.

2851280 is a gapful number since it is divisible by the number (20) 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 2851280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3431700).

2851280 is an abundant number, since it is smaller than the sum of its proper divisors (4012120).

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

2851280 is a wasteful number, since it uses less digits than its factorization.

2851280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 2851280 is about 1688.5733623388. The cubic root of 2851280 is about 141.8012162679.

The spelling of 2851280 in words is "two million, eight hundred fifty-one thousand, two hundred eighty".