1996128918 has 48 divisors (see below), whose sum is σ = 5002373376. Its totient is φ = 563448240.

The previous prime is 1996128917. The next prime is 1996128919. The reversal of 1996128918 is 8198216991.

1996128918 is a `hidden beast` number, since 1 + 9 + 9 + 612 + 8 + 9 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (1996128917) and next prime (1996128919).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996128917) 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 23 ways as a sum of consecutive naturals, for example, 84978 + ... + 105893.

It is an arithmetic number, because the mean of its divisors is an integer number (104216112).

Almost surely, 2^1996128918 is an apocalyptic number.

1996128918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1996128918 is an abundant number, since it is smaller than the sum of its proper divisors (3006244458).

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

1996128918 is a wasteful number, since it uses less digits than its factorization.

1996128918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190969 (or 190966 counting only the distinct ones).

The product of its digits is 559872, while the sum is 54.

The square root of 1996128918 is about 44678.0585746516. The cubic root of 1996128918 is about 1259.1076485955.

The spelling of 1996128918 in words is "one billion, nine hundred ninety-six million, one hundred twenty-eight thousand, nine hundred eighteen".