2115264788 has 72 divisors (see below), whose sum is σ = 4708440576. Its totient is φ = 809680320.

The previous prime is 2115264787. The next prime is 2115264799. The reversal of 2115264788 is 8874625112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115264787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346781 + ... + 352827.

It is an arithmetic number, because the mean of its divisors is an integer number (65395008).

Almost surely, 2^2115264788 is an apocalyptic number.

2115264788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115264788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354220288).

2115264788 is an abundant number, since it is smaller than the sum of its proper divisors (2593175788).

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

2115264788 is a wasteful number, since it uses less digits than its factorization.

2115264788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133 (or 6100 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 2115264788 is about 45992.0078709334. The cubic root of 2115264788 is about 1283.6744976733.

The spelling of 2115264788 in words is "two billion, one hundred fifteen million, two hundred sixty-four thousand, seven hundred eighty-eight".