9878415788 has 12 divisors (see below), whose sum is σ = 17300463432. Its totient is φ = 4935426240.

The previous prime is 9878415787. The next prime is 9878415791. The reversal of 9878415788 is 8875148789.

It is not an unprimeable number, because it can be changed into a prime (9878415787) 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, 939533 + ... + 949988.

It is an arithmetic number, because the mean of its divisors is an integer number (1441705286).

Almost surely, 2^9878415788 is an apocalyptic number.

It is an amenable number.

9878415788 is a deficient number, since it is larger than the sum of its proper divisors (7422047644).

9878415788 is a wasteful number, since it uses less digits than its factorization.

9878415788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890832 (or 1890830 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 65.

The square root of 9878415788 is about 99390.2197804190. The cubic root of 9878415788 is about 2145.6675537941.

The spelling of 9878415788 in words is "nine billion, eight hundred seventy-eight million, four hundred fifteen thousand, seven hundred eighty-eight".