2391867 has 12 divisors (see below), whose sum is σ = 3566784. Its totient is φ = 1542960.

The previous prime is 2391863. The next prime is 2391881. The reversal of 2391867 is 7681932.

It is not a de Polignac number, because 2391867 - 2² = 2391863 is a prime.

2391867 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2391863) 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, 4008 + ... + 4565.

It is an arithmetic number, because the mean of its divisors is an integer number (297232).

2^2391867 is an apocalyptic number.

2391867 is a deficient number, since it is larger than the sum of its proper divisors (1174917).

2391867 is a wasteful number, since it uses less digits than its factorization.

2391867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610 (or 8607 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2391867 is about 1546.5661964494. The cubic root of 2391867 is about 133.7351827997.

The spelling of 2391867 in words is "two million, three hundred ninety-one thousand, eight hundred sixty-seven".