2091860380 has 48 divisors (see below), whose sum is σ = 4438131264. Its totient is φ = 828172800.

The previous prime is 2091860369. The next prime is 2091860401. The reversal of 2091860380 is 830681902.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 944154 + ... + 946366.

It is an arithmetic number, because the mean of its divisors is an integer number (92461068).

Almost surely, 2^2091860380 is an apocalyptic number.

2091860380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2091860380 is an abundant number, since it is smaller than the sum of its proper divisors (2346270884).

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

2091860380 is a wasteful number, since it uses less digits than its factorization.

2091860380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686 (or 2684 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 2091860380 is about 45736.8601895670. The cubic root of 2091860380 is about 1278.9225103908.

The spelling of 2091860380 in words is "two billion, ninety-one million, eight hundred sixty thousand, three hundred eighty".