38388550620728 has 64 divisors (see below), whose sum is σ = 90258194488320. Its totient is φ = 14870123913600.

The previous prime is 38388550620703. The next prime is 38388550620733. The reversal of 38388550620728 is 82702605588383.

It is a super-2 number, since 2×38388550620728² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180006368 + ... + 180219503.

It is an arithmetic number, because the mean of its divisors is an integer number (1410284288880).

Almost surely, 2^{38388550620728} is an apocalyptic number.

It is an amenable number.

38388550620728 is an abundant number, since it is smaller than the sum of its proper divisors (51869643867592).

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

38388550620728 is a wasteful number, since it uses less digits than its factorization.

38388550620728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360226068 (or 360226064 counting only the distinct ones).

The product of its (nonzero) digits is 154828800, while the sum is 65.

The spelling of 38388550620728 in words is "thirty-eight trillion, three hundred eighty-eight billion, five hundred fifty million, six hundred twenty thousand, seven hundred twenty-eight".