2115905380 has 24 divisors (see below), whose sum is σ = 4445421120. Its totient is φ = 845977440.

The previous prime is 2115905371. The next prime is 2115905411. The reversal of 2115905380 is 835095112.

It is a super-2 number, since 2×2115905380² = 8954111154225888800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23331 + ... + 69109.

It is an arithmetic number, because the mean of its divisors is an integer number (185225880).

Almost surely, 2^2115905380 is an apocalyptic number.

2115905380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115905380 is an abundant number, since it is smaller than the sum of its proper divisors (2329515740).

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

2115905380 is a wasteful number, since it uses less digits than its factorization.

2115905380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48099 (or 48097 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 2115905380 is about 45998.9715102414. The cubic root of 2115905380 is about 1283.8040683102.

The spelling of 2115905380 in words is "two billion, one hundred fifteen million, nine hundred five thousand, three hundred eighty".