388725165 has 12 divisors (see below), whose sum is σ = 673790364. Its totient is φ = 207320064.

The previous prime is 388725163. The next prime is 388725173. The reversal of 388725165 is 561527883.

It can be written as a sum of positive squares in 2 ways, for example, as 59629284 + 329095881 = 7722^2 + 18141^2 .

It is not a de Polignac number, because 388725165 - 2¹ = 388725163 is a prime.

It is a super-2 number, since 2×388725165² = 302214507808554450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 8638337 = 388725165 / (3 + 8 + 8 + 7 + 2 + 5 + 1 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 388725165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388725163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4319124 + ... + 4319213.

It is an arithmetic number, because the mean of its divisors is an integer number (56149197).

Almost surely, 2^388725165 is an apocalyptic number.

It is an amenable number.

388725165 is a deficient number, since it is larger than the sum of its proper divisors (285065199).

388725165 is a wasteful number, since it uses less digits than its factorization.

388725165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8638348 (or 8638345 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 388725165 is about 19716.1143484207. The cubic root of 388725165 is about 729.8174091404.

The spelling of 388725165 in words is "three hundred eighty-eight million, seven hundred twenty-five thousand, one hundred sixty-five".