2109904640 has 72 divisors (see below), whose sum is σ = 5217007488. Its totient is φ = 816721920.

The previous prime is 2109904639. The next prime is 2109904691. The reversal of 2109904640 is 464099012.

It is a self number, because there is not a number n which added to its sum of digits gives 2109904640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13094 + ... + 66266.

Almost surely, 2^2109904640 is an apocalyptic number.

2109904640 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 2109904640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2608503744).

2109904640 is an abundant number, since it is smaller than the sum of its proper divisors (3107102848).

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

2109904640 is an equidigital number, since it uses as much as digits as its factorization.

2109904640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53225 (or 53211 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2109904640 is about 45933.6983052747. The cubic root of 2109904640 is about 1282.5892898884.

The spelling of 2109904640 in words is "two billion, one hundred nine million, nine hundred four thousand, six hundred forty".