2891404 has 12 divisors (see below), whose sum is σ = 5131728. Its totient is φ = 1425200.

The previous prime is 2891389. The next prime is 2891407. The reversal of 2891404 is 4041982.

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, 4807 + ... + 5374.

It is an arithmetic number, because the mean of its divisors is an integer number (427644).

2^2891404 is an apocalyptic number.

It is an amenable number.

2891404 is a deficient number, since it is larger than the sum of its proper divisors (2240324).

2891404 is a wasteful number, since it uses less digits than its factorization.

2891404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10256 (or 10254 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2891404 is about 1700.4128910356. The cubic root of 2891404 is about 142.4632756498.

The spelling of 2891404 in words is "two million, eight hundred ninety-one thousand, four hundred four".