7888889 has 4 divisors (see below), whose sum is σ = 7901520. Its totient is φ = 7876260.

The previous prime is 7888883. The next prime is 7888919. The reversal of 7888889 is 9888887.

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 7888889 - 2²⁰ = 6840313 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (7888883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5327 + ... + 6644.

It is an arithmetic number, because the mean of its divisors is an integer number (1975380).

Almost surely, 2^7888889 is an apocalyptic number.

It is an amenable number.

7888889 is a deficient number, since it is larger than the sum of its proper divisors (12631).

7888889 is a wasteful number, since it uses less digits than its factorization.

7888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12630.

The product of its digits is 2064384, while the sum is 56.

The square root of 7888889 is about 2808.7166108385. The cubic root of 7888889 is about 199.0697549288.

The spelling of 7888889 in words is "seven million, eight hundred eighty-eight thousand, eight hundred eighty-nine".