2881220 has 12 divisors (see below), whose sum is σ = 6050604. Its totient is φ = 1152480.

The previous prime is 2881183. The next prime is 2881243. The reversal of 2881220 is 221882.

It can be written as a sum of positive squares in 2 ways, for example, as 643204 + 2238016 = 802^2 + 1496^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 72011 + ... + 72050.

It is an arithmetic number, because the mean of its divisors is an integer number (504217).

2^2881220 is an apocalyptic number.

2881220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2881220 is an abundant number, since it is smaller than the sum of its proper divisors (3169384).

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

2881220 is a wasteful number, since it uses less digits than its factorization.

2881220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144070 (or 144068 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 2881220 is about 1697.4156827366. The cubic root of 2881220 is about 142.2958192038.

The spelling of 2881220 in words is "two million, eight hundred eighty-one thousand, two hundred twenty".