2891408 has 20 divisors (see below), whose sum is σ = 6033468. Its totient is φ = 1334400.

The previous prime is 2891407. The next prime is 2891417. The reversal of 2891408 is 8041982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1373584 + 1517824 = 1172^2 + 1232^2 .

It is not an unprimeable number, because it can be changed into a prime (2891407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6743 + ... + 7158.

2^2891408 is an apocalyptic number.

It is an amenable number.

2891408 is an abundant number, since it is smaller than the sum of its proper divisors (3142060).

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

2891408 is a wasteful number, since it uses less digits than its factorization.

2891408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13922 (or 13916 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 2891408 is about 1700.4140672201. The cubic root of 2891408 is about 142.4633413448.

The spelling of 2891408 in words is "two million, eight hundred ninety-one thousand, four hundred eight".