1996809280 has 56 divisors (see below), whose sum is σ = 4761948312. Its totient is φ = 797540352.

The previous prime is 1996809277. The next prime is 1996809281. The reversal of 1996809280 is 829086991.

It can be written as a sum of positive squares in 4 ways, for example, as 1334879296 + 661929984 = 36536^2 + 25728^2 .

It is not an unprimeable number, because it can be changed into a prime (1996809281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230304 + ... + 238816.

Almost surely, 2^1996809280 is an apocalyptic number.

1996809280 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 1996809280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2380974156).

1996809280 is an abundant number, since it is smaller than the sum of its proper divisors (2765139032).

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

1996809280 is an equidigital number, since it uses as much as digits as its factorization.

1996809280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9263 (or 9253 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 1996809280 is about 44685.6719765967. The cubic root of 1996809280 is about 1259.2506840614.

The spelling of 1996809280 in words is "one billion, nine hundred ninety-six million, eight hundred nine thousand, two hundred eighty".