1996801280 has 54 divisors (see below), whose sum is σ = 4786795566. Its totient is φ = 798081024.

The previous prime is 1996801271. The next prime is 1996801291. The reversal of 1996801280 is 821086991.

It can be written as a sum of positive squares in 3 ways, for example, as 104203264 + 1892598016 = 10208^2 + 43504^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1598096 + ... + 1599344.

Almost surely, 2^1996801280 is an apocalyptic number.

1996801280 is a gapful number since it is divisible by the number (10) 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 1996801280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2393397783).

1996801280 is an abundant number, since it is smaller than the sum of its proper divisors (2789994286).

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

1996801280 is an frugal number, since it uses more digits than its factorization.

1996801280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 1996801280 is about 44685.5824623558. The cubic root of 1996801280 is about 1259.2490023753.

The spelling of 1996801280 in words is "one billion, nine hundred ninety-six million, eight hundred one thousand, two hundred eighty".