19240438328 has 8 divisors (see below), whose sum is σ = 36075821880. Its totient is φ = 9620219160.

The previous prime is 19240438297. The next prime is 19240438379. The reversal of 19240438328 is 82383404291.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1202527388 + ... + 1202527403.

It is an arithmetic number, because the mean of its divisors is an integer number (4509477735).

Almost surely, 2^19240438328 is an apocalyptic number.

It is an amenable number.

19240438328 is a deficient number, since it is larger than the sum of its proper divisors (16835383552).

19240438328 is a wasteful number, since it uses less digits than its factorization.

19240438328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405054797 (or 2405054793 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 19240438328 in words is "nineteen billion, two hundred forty million, four hundred thirty-eight thousand, three hundred twenty-eight".