1980920448 has 448 divisors, whose sum is σ = 6742673280. Its totient is φ = 574801920.

The previous prime is 1980920443. The next prime is 1980920479. The reversal of 1980920448 is 8440290891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980920441) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 27900253 + ... + 27900323.

It is an arithmetic number, because the mean of its divisors is an integer number (15050610).

Almost surely, 2^1980920448 is an apocalyptic number.

1980920448 is a gapful number since it is divisible by the number (18) 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 1980920448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3371336640).

1980920448 is an abundant number, since it is smaller than the sum of its proper divisors (4761752832).

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

1980920448 is an equidigital number, since it uses as much as digits as its factorization.

1980920448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1980920448 is about 44507.5324860860. The cubic root of 1980920448 is about 1255.9017868489.

The spelling of 1980920448 in words is "one billion, nine hundred eighty million, nine hundred twenty thousand, four hundred forty-eight".