1996916640 has 192 divisors, whose sum is σ = 6501720960. Its totient is φ = 514805760.

The previous prime is 1996916639. The next prime is 1996916653. The reversal of 1996916640 is 466196991.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4066795 + ... + 4067285.

It is an arithmetic number, because the mean of its divisors is an integer number (33863130).

Almost surely, 2^1996916640 is an apocalyptic number.

1996916640 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 1996916640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3250860480).

1996916640 is an abundant number, since it is smaller than the sum of its proper divisors (4504804320).

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

1996916640 is a wasteful number, since it uses less digits than its factorization.

1996916640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 1996916640 is about 44686.8732403600. The cubic root of 1996916640 is about 1259.2732518536.

The spelling of 1996916640 in words is "one billion, nine hundred ninety-six million, nine hundred sixteen thousand, six hundred forty".