2881390 has 16 divisors (see below), whose sum is σ = 5206032. Its totient is φ = 1148224.

The previous prime is 2881379. The next prime is 2881391. The reversal of 2881390 is 931882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4362 + ... + 4978.

It is an arithmetic number, because the mean of its divisors is an integer number (325377).

2^2881390 is an apocalyptic number.

2881390 is a deficient number, since it is larger than the sum of its proper divisors (2324642).

2881390 is a wasteful number, since it uses less digits than its factorization.

2881390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 2881390 is about 1697.4657581230. The cubic root of 2881390 is about 142.2986177653.

It can be divided in two parts, 28 and 81390, that added together give a palindrome (81418).

The spelling of 2881390 in words is "two million, eight hundred eighty-one thousand, three hundred ninety".