9138978960 has 80 divisors (see below), whose sum is σ = 28581634944. Its totient is φ = 2415486976.

The previous prime is 9138978943. The next prime is 9138978977. The reversal of 9138978960 is 698798319.

It is an interprime number because it is at equal distance from previous prime (9138978943) and next prime (9138978977).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 9138978894 and 9138978903.

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 15 ways as a sum of consecutive naturals, for example, 141372 + ... + 195611.

Almost surely, 2^9138978960 is an apocalyptic number.

It is an amenable number.

9138978960 is an abundant number, since it is smaller than the sum of its proper divisors (19442655984).

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

9138978960 is a wasteful number, since it uses less digits than its factorization.

9138978960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337112 (or 337106 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 60.

The square root of 9138978960 is about 95598.0070921983. The cubic root of 9138978960 is about 2090.7361371383.

The spelling of 9138978960 in words is "nine billion, one hundred thirty-eight million, nine hundred seventy-eight thousand, nine hundred sixty".