2115399860 has 48 divisors (see below), whose sum is σ = 5095923840. Its totient is φ = 722570880.

The previous prime is 2115399859. The next prime is 2115399877. The reversal of 2115399860 is 689935112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9575 + ... + 65745.

It is an arithmetic number, because the mean of its divisors is an integer number (106165080).

Almost surely, 2^2115399860 is an apocalyptic number.

2115399860 is a gapful number since it is divisible by the number (20) 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 2115399860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2547961920).

2115399860 is an abundant number, since it is smaller than the sum of its proper divisors (2980523980).

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

2115399860 is a wasteful number, since it uses less digits than its factorization.

2115399860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56456 (or 56454 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 2115399860 is about 45993.4762765330. The cubic root of 2115399860 is about 1283.7018204609.

The spelling of 2115399860 in words is "two billion, one hundred fifteen million, three hundred ninety-nine thousand, eight hundred sixty".