7988985893 has 16 divisors (see below), whose sum is σ = 9171947520. Its totient is φ = 6816518016.

The previous prime is 7988985889. The next prime is 7988985911. The reversal of 7988985893 is 3985898897.

It is not a de Polignac number, because 7988985893 - 2² = 7988985889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7988985893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988982893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1522871 + ... + 1528107.

It is an arithmetic number, because the mean of its divisors is an integer number (573246720).

Almost surely, 2^7988985893 is an apocalyptic number.

It is an amenable number.

7988985893 is a deficient number, since it is larger than the sum of its proper divisors (1182961627).

7988985893 is a wasteful number, since it uses less digits than its factorization.

7988985893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196.

The product of its digits is 313528320, while the sum is 74.

The square root of 7988985893 is about 89381.1271634007. The cubic root of 7988985893 is about 1999.0817362103.

The spelling of 7988985893 in words is "seven billion, nine hundred eighty-eight million, nine hundred eighty-five thousand, eight hundred ninety-three".