9115107840 has 120 divisors (see below), whose sum is σ = 31568261868. Its totient is φ = 2430689280.

The previous prime is 9115107811. The next prime is 9115107857. The reversal of 9115107840 is 487015119.

It can be written as a sum of positive squares in 2 ways, for example, as 8751976704 + 363131136 = 93552^2 + 19056^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 9115107795 and 9115107804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174771 + ... + 220850.

Almost surely, 2^9115107840 is an apocalyptic number.

9115107840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9115107840 is an abundant number, since it is smaller than the sum of its proper divisors (22453154028).

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

9115107840 is a wasteful number, since it uses less digits than its factorization.

9115107840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395650 (or 395631 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 9115107840 is about 95473.0739004459. The cubic root of 9115107840 is about 2088.9142074962.

The spelling of 9115107840 in words is "nine billion, one hundred fifteen million, one hundred seven thousand, eight hundred forty".