7868391 has 8 divisors (see below), whose sum is σ = 10510080. Its totient is φ = 5236152.

The previous prime is 7868381. The next prime is 7868423. The reversal of 7868391 is 1938687.

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

It is not a de Polignac number, because 7868391 - 2⁵ = 7868359 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7868381) 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, 111 + ... + 3968.

It is an arithmetic number, because the mean of its divisors is an integer number (1313760).

Almost surely, 2^7868391 is an apocalyptic number.

7868391 is a deficient number, since it is larger than the sum of its proper divisors (2641689).

7868391 is a wasteful number, since it uses less digits than its factorization.

7868391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725.

The product of its digits is 72576, while the sum is 42.

The square root of 7868391 is about 2805.0652398830. The cubic root of 7868391 is about 198.8971885447.

The spelling of 7868391 in words is "seven million, eight hundred sixty-eight thousand, three hundred ninety-one".