388645227764 has 12 divisors (see below), whose sum is σ = 680226178884. Its totient is φ = 194294890944.

The previous prime is 388645227739. The next prime is 388645227793. The reversal of 388645227764 is 467722546883.

It can be written as a sum of positive squares in 2 ways, for example, as 206906716900 + 181738510864 = 454870^2 + 426308^2 .

It is a super-2 number, since 2×388645227764² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388645227697 and 388645227706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6899177 + ... + 6955280.

It is an arithmetic number, because the mean of its divisors is an integer number (56685514907).

Almost surely, 2^388645227764 is an apocalyptic number.

It is an amenable number.

388645227764 is a deficient number, since it is larger than the sum of its proper divisors (291580951120).

388645227764 is a wasteful number, since it uses less digits than its factorization.

388645227764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13861474 (or 13861472 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 62.

The spelling of 388645227764 in words is "three hundred eighty-eight billion, six hundred forty-five million, two hundred twenty-seven thousand, seven hundred sixty-four".