1385940604728 has 64 divisors (see below), whose sum is σ = 3520428740640. Its totient is φ = 454599143424.

The previous prime is 1385940604721. The next prime is 1385940604729. The reversal of 1385940604728 is 8274060495831.

It is a happy number.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385940604721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154851 + ... + 1672082.

It is a 1-persistent number, because it is pandigital, but 2⋅1385940604728 = 2771881209456 is not.

Almost surely, 2^{1385940604728} is an apocalyptic number.

It is an amenable number.

1385940604728 is an abundant number, since it is smaller than the sum of its proper divisors (2134488135912).

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

1385940604728 is a wasteful number, since it uses less digits than its factorization.

1385940604728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827448 (or 1827444 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 1385940604728 in words is "one trillion, three hundred eighty-five billion, nine hundred forty million, six hundred four thousand, seven hundred twenty-eight".