2404391 has 12 divisors (see below), whose sum is σ = 2732352. Its totient is φ = 2112000.

The previous prime is 2404387. The next prime is 2404399. The reversal of 2404391 is 1934042.

It is not a de Polignac number, because 2404391 - 2² = 2404387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2404399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3431 + ... + 4071.

It is an arithmetic number, because the mean of its divisors is an integer number (227696).

2^2404391 is an apocalyptic number.

2404391 is a deficient number, since it is larger than the sum of its proper divisors (327961).

2404391 is a wasteful number, since it uses less digits than its factorization.

2404391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2404391 is about 1550.6098800150. The cubic root of 2404391 is about 133.9681924950.

The spelling of 2404391 in words is "two million, four hundred four thousand, three hundred ninety-one".