1996709440 has 112 divisors (see below), whose sum is σ = 5327440704. Its totient is φ = 706406400.

The previous prime is 1996709423. The next prime is 1996709443. The reversal of 1996709440 is 449076991.

It is a super-2 number, since 2×1996709440² = 7973697175570227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1996709443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122575 + ... + 137905.

Almost surely, 2^1996709440 is an apocalyptic number.

1996709440 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 1996709440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2663720352).

1996709440 is an abundant number, since it is smaller than the sum of its proper divisors (3330731264).

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

1996709440 is a wasteful number, since it uses less digits than its factorization.

1996709440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15396 (or 15386 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 1996709440 is about 44684.5548260246. The cubic root of 1996709440 is about 1259.2296962977.

The spelling of 1996709440 in words is "one billion, nine hundred ninety-six million, seven hundred nine thousand, four hundred forty".