2109359780 has 48 divisors (see below), whose sum is σ = 4840081344. Its totient is φ = 765813120.

The previous prime is 2109359771. The next prime is 2109359783. The reversal of 2109359780 is 879539012.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (2109359783) by changing a digit.

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, 136319 + ... + 151001.

It is an arithmetic number, because the mean of its divisors is an integer number (100835028).

Almost surely, 2^2109359780 is an apocalyptic number.

2109359780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2109359780 is an abundant number, since it is smaller than the sum of its proper divisors (2730721564).

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

2109359780 is a wasteful number, since it uses less digits than its factorization.

2109359780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15356 (or 15354 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 2109359780 is about 45927.7669825129. The cubic root of 2109359780 is about 1282.4788754568.

The spelling of 2109359780 in words is "two billion, one hundred nine million, three hundred fifty-nine thousand, seven hundred eighty".