2115899380 has 36 divisors (see below), whose sum is σ = 5168842308. Its totient is φ = 725450880.

The previous prime is 2115899369. The next prime is 2115899381. The reversal of 2115899380 is 839985112.

It can be written as a sum of positive squares in 2 ways, for example, as 1278491536 + 837407844 = 35756^2 + 28938^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2115899380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115899381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1078561 + ... + 1080520.

It is an arithmetic number, because the mean of its divisors is an integer number (143578953).

Almost surely, 2^2115899380 is an apocalyptic number.

2115899380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115899380 is an abundant number, since it is smaller than the sum of its proper divisors (3052942928).

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

2115899380 is a wasteful number, since it uses less digits than its factorization.

2115899380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159104 (or 2159095 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 2115899380 is about 45998.9062913457. The cubic root of 2115899380 is about 1283.8028548294.

The spelling of 2115899380 in words is "two billion, one hundred fifteen million, eight hundred ninety-nine thousand, three hundred eighty".