2881405 has 8 divisors (see below), whose sum is σ = 3468600. Its totient is φ = 2297856.

The previous prime is 2881399. The next prime is 2881409. The reversal of 2881405 is 5041882.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 2732409 = 386^2 + 1653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2881405 - 2³ = 2881397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (433575).

2^2881405 is an apocalyptic number.

It is an amenable number.

2881405 is a deficient number, since it is larger than the sum of its proper divisors (587195).

2881405 is a wasteful number, since it uses less digits than its factorization.

2881405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 2881405 is about 1697.4701764685. The cubic root of 2881405 is about 142.2988646919.

The spelling of 2881405 in words is "two million, eight hundred eighty-one thousand, four hundred five".