388663465 has 4 divisors (see below), whose sum is σ = 466396164. Its totient is φ = 310930768.

The previous prime is 388663459. The next prime is 388663493. The reversal of 388663465 is 564366883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 255584169 + 133079296 = 15987^2 + 11536^2 .

It is a cyclic number.

It is not a de Polignac number, because 388663465 - 2⁵ = 388663433 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38866342 + ... + 38866351.

It is an arithmetic number, because the mean of its divisors is an integer number (116599041).

Almost surely, 2^388663465 is an apocalyptic number.

It is an amenable number.

388663465 is a deficient number, since it is larger than the sum of its proper divisors (77732699).

388663465 is an equidigital number, since it uses as much as digits as its factorization.

388663465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77732698.

The product of its digits is 2488320, while the sum is 49.

The square root of 388663465 is about 19714.5495763915. The cubic root of 388663465 is about 729.7787939260.

The spelling of 388663465 in words is "three hundred eighty-eight million, six hundred sixty-three thousand, four hundred sixty-five".