2684391 has 8 divisors (see below), whose sum is σ = 3586800. Its totient is φ = 1785792.

The previous prime is 2684389. The next prime is 2684401. The reversal of 2684391 is 1934862.

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

It is not a de Polignac number, because 2684391 - 2¹ = 2684389 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684371) 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, 2035 + ... + 3083.

It is an arithmetic number, because the mean of its divisors is an integer number (448350).

2^2684391 is an apocalyptic number.

2684391 is a deficient number, since it is larger than the sum of its proper divisors (902409).

2684391 is a wasteful number, since it uses less digits than its factorization.

2684391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905.

The product of its digits is 10368, while the sum is 33.

The square root of 2684391 is about 1638.4111205677. The cubic root of 2684391 is about 138.9788108411.

The spelling of 2684391 in words is "two million, six hundred eighty-four thousand, three hundred ninety-one".