2816391 has 8 divisors (see below), whose sum is σ = 3763584. Its totient is φ = 1873400.

The previous prime is 2816377. The next prime is 2816399. The reversal of 2816391 is 1936182.

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 2816391 - 2⁷ = 2816263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2816399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216 + ... + 2666.

It is an arithmetic number, because the mean of its divisors is an integer number (470448).

2^2816391 is an apocalyptic number.

2816391 is a deficient number, since it is larger than the sum of its proper divisors (947193).

2816391 is a wasteful number, since it uses less digits than its factorization.

2816391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101.

The product of its digits is 2592, while the sum is 30.

The square root of 2816391 is about 1678.2106542386. The cubic root of 2816391 is about 141.2204689354.

The spelling of 2816391 in words is "two million, eight hundred sixteen thousand, three hundred ninety-one".