7939888 has 40 divisors (see below), whose sum is σ = 16940880. Its totient is φ = 3575040.

The previous prime is 7939861. The next prime is 7939909. The reversal of 7939888 is 8889397.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34558 + ... + 34786.

It is an arithmetic number, because the mean of its divisors is an integer number (423522).

Almost surely, 2^7939888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7939888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8470440).

7939888 is an abundant number, since it is smaller than the sum of its proper divisors (9000992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7939888 is a wasteful number, since it uses less digits than its factorization.

7939888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 439 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 7939888 is about 2817.7806869946. The cubic root of 7939888 is about 199.4978067317.

The spelling of 7939888 in words is "seven million, nine hundred thirty-nine thousand, eight hundred eighty-eight".