388365849 has 9 divisors (see below), whose sum is σ = 561058303. Its totient is φ = 258871152.

The previous prime is 388365847. The next prime is 388365851. The reversal of 388365849 is 948563883.

It is a happy number.

The square root of 388365849 is 19707.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (388365847) and next prime (388365851).

It can be written as a sum of positive squares in only one way, i.e., 349428249 + 38937600 = 18693^2 + 6240^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 388365849 - 2¹ = 388365847 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 388365795 and 388365804.

It is not an unprimeable number, because it can be changed into a prime (388365847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 55837 + ... + 62405.

Almost surely, 2^388365849 is an apocalyptic number.

388365849 is the 19707-th square number.

388365849 is the 9854-th centered octagonal number.

It is an amenable number.

388365849 is a deficient number, since it is larger than the sum of its proper divisors (172692454).

388365849 is an frugal number, since it uses more digits than its factorization.

388365849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13144 (or 6572 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The cubic root of 388365849 is about 729.5924722305.

The spelling of 388365849 in words is "three hundred eighty-eight million, three hundred sixty-five thousand, eight hundred forty-nine".