388536469 has 4 divisors (see below), whose sum is σ = 388668940. Its totient is φ = 388404000.

The previous prime is 388536443. The next prime is 388536487. The reversal of 388536469 is 964635883.

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 110880900 + 277655569 = 10530^2 + 16663^2 .

It is a cyclic number.

It is not a de Polignac number, because 388536469 - 2¹⁵ = 388503701 is a prime.

It is a super-2 number, since 2×388536469² = 301921175485975922, which 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 (388536419) by changing a digit.

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, 61734 + ... + 67735.

It is an arithmetic number, because the mean of its divisors is an integer number (97167235).

Almost surely, 2^388536469 is an apocalyptic number.

It is an amenable number.

388536469 is a deficient number, since it is larger than the sum of its proper divisors (132471).

388536469 is a wasteful number, since it uses less digits than its factorization.

388536469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132470.

The product of its digits is 3732480, while the sum is 52.

The square root of 388536469 is about 19711.3284433089. The cubic root of 388536469 is about 729.6993000603.

The spelling of 388536469 in words is "three hundred eighty-eight million, five hundred thirty-six thousand, four hundred sixty-nine".