2115912740 has 48 divisors (see below), whose sum is σ = 4544467200. Its totient is φ = 827544416.

The previous prime is 2115912691. The next prime is 2115912749. The reversal of 2115912740 is 472195112.

It is a junction number, because it is equal to n+sod(n) for n = 2115912697 and 2115912706.

It is not an unprimeable number, because it can be changed into a prime (2115912749) 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, 2075951 + ... + 2076969.

It is an arithmetic number, because the mean of its divisors is an integer number (94676400).

Almost surely, 2^2115912740 is an apocalyptic number.

2115912740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115912740 is an abundant number, since it is smaller than the sum of its proper divisors (2428554460).

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

2115912740 is an equidigital number, since it uses as much as digits as its factorization.

2115912740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2115912740 is about 45999.0515119605. The cubic root of 2115912740 is about 1283.8055568436.

The spelling of 2115912740 in words is "two billion, one hundred fifteen million, nine hundred twelve thousand, seven hundred forty".