1996782840 has 160 divisors (see below), whose sum is σ = 7227823680. Its totient is φ = 491505408.

The previous prime is 1996782839. The next prime is 1996782841. The reversal of 1996782840 is 482876991.

It is an interprime number because it is at equal distance from previous prime (1996782839) and next prime (1996782841).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996782841) 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 39 ways as a sum of consecutive naturals, for example, 18417 + ... + 65823.

It is an arithmetic number, because the mean of its divisors is an integer number (45173898).

Almost surely, 2^1996782840 is an apocalyptic number.

1996782840 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 1996782840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3613911840).

1996782840 is an abundant number, since it is smaller than the sum of its proper divisors (5231040840).

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

1996782840 is a wasteful number, since it uses less digits than its factorization.

1996782840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47443 (or 47430 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 1996782840 is about 44685.3761313475. The cubic root of 1996782840 is about 1259.2451260719.

The spelling of 1996782840 in words is "one billion, nine hundred ninety-six million, seven hundred eighty-two thousand, eight hundred forty".