2881445 has 24 divisors (see below), whose sum is σ = 4240800. Its totient is φ = 1868832.

The previous prime is 2881441. The next prime is 2881447. The reversal of 2881445 is 5441882.

It is a happy number.

It is not a de Polignac number, because 2881445 - 2² = 2881441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4346 + ... + 4964.

It is an arithmetic number, because the mean of its divisors is an integer number (176700).

2^2881445 is an apocalyptic number.

It is an amenable number.

2881445 is a deficient number, since it is larger than the sum of its proper divisors (1359355).

2881445 is a wasteful number, since it uses less digits than its factorization.

2881445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 650 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 2881445 is about 1697.4819586670. The cubic root of 2881445 is about 142.2995231586.

The spelling of 2881445 in words is "two million, eight hundred eighty-one thousand, four hundred forty-five".