2108640520 has 128 divisors (see below), whose sum is σ = 5824800000. Its totient is φ = 684827136.

The previous prime is 2108640449. The next prime is 2108640559. The reversal of 2108640520 is 250468012.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 31 ways as a sum of consecutive naturals, for example, 256636 + ... + 264724.

It is an arithmetic number, because the mean of its divisors is an integer number (45506250).

Almost surely, 2^2108640520 is an apocalyptic number.

2108640520 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 2108640520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2912400000).

2108640520 is an abundant number, since it is smaller than the sum of its proper divisors (3716159480).

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

2108640520 is a wasteful number, since it uses less digits than its factorization.

2108640520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140 (or 8122 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2108640520 is about 45919.9359755651. The cubic root of 2108640520 is about 1282.3330902080. Note that the first 3 decimals are identical.

The spelling of 2108640520 in words is "two billion, one hundred eight million, six hundred forty thousand, five hundred twenty".