1538941033728 has 864 divisors, whose sum is σ = 5596112256000. Its totient is φ = 414797967360.

The previous prime is 1538941033727. The next prime is 1538941033733. The reversal of 1538941033728 is 8273301498351.

1538941033728 is a `hidden beast` number, since 1 + 53 + 89 + 410 + 33 + 72 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

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 (1538941033727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2438891973 + ... + 2438892603.

Almost surely, 2^{1538941033728} is an apocalyptic number.

1538941033728 is a gapful number since it is divisible by the number (18) 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 1538941033728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2798056128000).

1538941033728 is an abundant number, since it is smaller than the sum of its proper divisors (4057171222272).

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

1538941033728 is a wasteful number, since it uses less digits than its factorization.

1538941033728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 1538941033728 in words is "one trillion, five hundred thirty-eight billion, nine hundred forty-one million, thirty-three thousand, seven hundred twenty-eight".