7868389 has 4 divisors (see below), whose sum is σ = 8122240. Its totient is φ = 7614540.

The previous prime is 7868381. The next prime is 7868423. The reversal of 7868389 is 9838687.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7868389 - 2³ = 7868381 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126879 + ... + 126940.

It is an arithmetic number, because the mean of its divisors is an integer number (2030560).

Almost surely, 2^7868389 is an apocalyptic number.

It is an amenable number.

7868389 is a deficient number, since it is larger than the sum of its proper divisors (253851).

7868389 is a wasteful number, since it uses less digits than its factorization.

7868389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253850.

The product of its digits is 580608, while the sum is 49.

The square root of 7868389 is about 2805.0648833851. The cubic root of 7868389 is about 198.8971716927.

The spelling of 7868389 in words is "seven million, eight hundred sixty-eight thousand, three hundred eighty-nine".