1980697344 has 72 divisors (see below), whose sum is σ = 5371116912. Its totient is φ = 647761920.

The previous prime is 1980697339. The next prime is 1980697391. The reversal of 1980697344 is 4437960891.

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, 16374 + ... + 65034.

It is an arithmetic number, because the mean of its divisors is an integer number (74598846).

Almost surely, 2^1980697344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980697344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2685558456).

1980697344 is an abundant number, since it is smaller than the sum of its proper divisors (3390419568).

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

1980697344 is an equidigital number, since it uses as much as digits as its factorization.

1980697344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48733 (or 48719 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 1980697344 is about 44505.0260532448. The cubic root of 1980697344 is about 1255.8546358334.

The spelling of 1980697344 in words is "one billion, nine hundred eighty million, six hundred ninety-seven thousand, three hundred forty-four".