2831280 has 80 divisors (see below), whose sum is σ = 8999424. Its totient is φ = 736000.

The previous prime is 2831273. The next prime is 2831293. The reversal of 2831280 is 821382.

2831280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2831280² = 16032292876800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2831280.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11155 + ... + 11405.

2^2831280 is an apocalyptic number.

2831280 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 2831280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4499712).

2831280 is an abundant number, since it is smaller than the sum of its proper divisors (6168144).

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

2831280 is a wasteful number, since it uses less digits than its factorization.

2831280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 2831280 is about 1682.6407816287. The cubic root of 2831280 is about 141.4688881809.

The spelling of 2831280 in words is "two million, eight hundred thirty-one thousand, two hundred eighty".