1999280796 has 24 divisors (see below), whose sum is σ = 4867814784. Its totient is φ = 637451760.

The previous prime is 1999280791. The next prime is 1999280797. The reversal of 1999280796 is 6970829991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999280791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3621610 + ... + 3622161.

It is an arithmetic number, because the mean of its divisors is an integer number (202825616).

Almost surely, 2^1999280796 is an apocalyptic number.

It is an amenable number.

1999280796 is an abundant number, since it is smaller than the sum of its proper divisors (2868533988).

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

1999280796 is a wasteful number, since it uses less digits than its factorization.

1999280796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7243801 (or 7243799 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 60.

The square root of 1999280796 is about 44713.3178818123. The cubic root of 1999280796 is about 1259.7700084120.

The spelling of 1999280796 in words is "one billion, nine hundred ninety-nine million, two hundred eighty thousand, seven hundred ninety-six".