2071908990 has 128 divisors (see below), whose sum is σ = 5775390720. Its totient is φ = 528038784.

The previous prime is 2071908989. The next prime is 2071909001. The reversal of 2071908990 is 998091702.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 543772 + ... + 547568.

It is an arithmetic number, because the mean of its divisors is an integer number (45120240).

Almost surely, 2^2071908990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2071908990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2887695360).

2071908990 is an abundant number, since it is smaller than the sum of its proper divisors (3703481730).

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

2071908990 is a wasteful number, since it uses less digits than its factorization.

2071908990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903 (or 3897 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 2071908990 is about 45518.2270085292. The cubic root of 2071908990 is about 1274.8435517381.

The spelling of 2071908990 in words is "two billion, seventy-one million, nine hundred eight thousand, nine hundred ninety".