2856280 has 48 divisors (see below), whose sum is σ = 7418160. Its totient is φ = 969600.

The previous prime is 2856253. The next prime is 2856283. The reversal of 2856280 is 826582.

2856280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28230 + ... + 28330.

It is an arithmetic number, because the mean of its divisors is an integer number (154545).

2^2856280 is an apocalyptic number.

2856280 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 2856280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3709080).

2856280 is an abundant number, since it is smaller than the sum of its proper divisors (4561880).

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

2856280 is a wasteful number, since it uses less digits than its factorization.

2856280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2856280 is about 1690.0532535988. The cubic root of 2856280 is about 141.8840553258.

It can be divided in two parts, 2856 and 280, that added together give a square (3136 = 56²).

The spelling of 2856280 in words is "two million, eight hundred fifty-six thousand, two hundred eighty".