388766089 has 4 divisors (see below), whose sum is σ = 388807060. Its totient is φ = 388725120.

The previous prime is 388766057. The next prime is 388766111. The reversal of 388766089 is 980667883.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 350326089 + 38440000 = 18717^2 + 6200^2 .

It is a cyclic number.

It is not a de Polignac number, because 388766089 - 2⁵ = 388766057 is a prime.

It is a super-2 number, since 2×388766089² = 302278143912711842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388766039) 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, 1909 + ... + 27949.

It is an arithmetic number, because the mean of its divisors is an integer number (97201765).

Almost surely, 2^388766089 is an apocalyptic number.

It is an amenable number.

388766089 is a deficient number, since it is larger than the sum of its proper divisors (40971).

388766089 is a wasteful number, since it uses less digits than its factorization.

388766089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40970.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 388766089 is about 19717.1521523774. The cubic root of 388766089 is about 729.8430193506.

The spelling of 388766089 in words is "three hundred eighty-eight million, seven hundred sixty-six thousand, eighty-nine".