388355305381 has 16 divisors (see below), whose sum is σ = 392133381120. Its totient is φ = 384600368880.

The previous prime is 388355305367. The next prime is 388355305391. The reversal of 388355305381 is 183503553883.

It is a cyclic number.

It is not a de Polignac number, because 388355305381 - 2¹⁷ = 388355174309 is a prime.

It is a super-2 number, since 2×388355305381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388355305301) 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, 36157710 + ... + 36168448.

It is an arithmetic number, because the mean of its divisors is an integer number (24508336320).

Almost surely, 2^388355305381 is an apocalyptic number.

It is an amenable number.

388355305381 is a deficient number, since it is larger than the sum of its proper divisors (3778075739).

388355305381 is a wasteful number, since it uses less digits than its factorization.

388355305381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 388355305381 in words is "three hundred eighty-eight billion, three hundred fifty-five million, three hundred five thousand, three hundred eighty-one".