1996505280 has 448 divisors, whose sum is σ = 8784092160. Its totient is φ = 414720000.

The previous prime is 1996505257. The next prime is 1996505297. The reversal of 1996505280 is 825056991.

It is a tau number, because it is divible by the number of its divisors (448).

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, 663780 + ... + 666780.

Almost surely, 2^1996505280 is an apocalyptic number.

1996505280 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 1996505280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4392046080).

1996505280 is an abundant number, since it is smaller than the sum of its proper divisors (6787586880).

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

1996505280 is a wasteful number, since it uses less digits than its factorization.

1996505280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 1996505280 is about 44682.2703093744. The cubic root of 1996505280 is about 1259.1867768336.

The spelling of 1996505280 in words is "one billion, nine hundred ninety-six million, five hundred five thousand, two hundred eighty".