1996921144 has 8 divisors (see below), whose sum is σ = 3744227160. Its totient is φ = 998460568.

The previous prime is 1996921127. The next prime is 1996921159. The reversal of 1996921144 is 4411296991.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1996921094 and 1996921103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124807564 + ... + 124807579.

It is an arithmetic number, because the mean of its divisors is an integer number (468028395).

Almost surely, 2^1996921144 is an apocalyptic number.

It is an amenable number.

1996921144 is a deficient number, since it is larger than the sum of its proper divisors (1747306016).

1996921144 is a wasteful number, since it uses less digits than its factorization.

1996921144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249615149 (or 249615145 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 1996921144 is about 44686.9236354440. The cubic root of 1996921144 is about 1259.2741986069.

The spelling of 1996921144 in words is "one billion, nine hundred ninety-six million, nine hundred twenty-one thousand, one hundred forty-four".