2667891 has 8 divisors (see below), whose sum is σ = 3672064. Its totient is φ = 1721160.

The previous prime is 2667887. The next prime is 2667919. The reversal of 2667891 is 1987662.

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

It is not a de Polignac number, because 2667891 - 2² = 2667887 is a prime.

It is a Duffinian number.

2667891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2667851) 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, 14251 + ... + 14436.

It is an arithmetic number, because the mean of its divisors is an integer number (459008).

2^2667891 is an apocalyptic number.

2667891 is a deficient number, since it is larger than the sum of its proper divisors (1004173).

2667891 is a wasteful number, since it uses less digits than its factorization.

2667891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28721.

The product of its digits is 36288, while the sum is 39.

The square root of 2667891 is about 1633.3679928295. The cubic root of 2667891 is about 138.6934742560.

The spelling of 2667891 in words is "two million, six hundred sixty-seven thousand, eight hundred ninety-one".