7898789878 has 32 divisors (see below), whose sum is σ = 13723315200. Its totient is φ = 3339633024.

The previous prime is 7898789861. The next prime is 7898789879. The reversal of 7898789878 is 8789878987.

7898789878 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

7898789878 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (79).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 7898789798 and 7898789807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7898789879) 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, 1963353 + ... + 1967371.

It is an arithmetic number, because the mean of its divisors is an integer number (428853600).

Almost surely, 2^7898789878 is an apocalyptic number.

7898789878 is a deficient number, since it is larger than the sum of its proper divisors (5824525322).

7898789878 is a wasteful number, since it uses less digits than its factorization.

7898789878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5884.

The product of its digits is 910393344, while the sum is 79.

The square root of 7898789878 is about 88875.1364443397. The cubic root of 7898789878 is about 1991.5300033824.

The spelling of 7898789878 in words is "seven billion, eight hundred ninety-eight million, seven hundred eighty-nine thousand, eight hundred seventy-eight".