388128589 has 2 divisors, whose sum is σ = 388128590. Its totient is φ = 388128588.

The previous prime is 388128569. The next prime is 388128613. The reversal of 388128589 is 985821883.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260822500 + 127306089 = 16150^2 + 11283^2 .

It is a cyclic number.

It is not a de Polignac number, because 388128589 - 2¹⁷ = 387997517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388128539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194064294 + 194064295.

It is an arithmetic number, because the mean of its divisors is an integer number (194064295).

Almost surely, 2^388128589 is an apocalyptic number.

It is an amenable number.

388128589 is a deficient number, since it is larger than the sum of its proper divisors (1).

388128589 is an equidigital number, since it uses as much as digits as its factorization.

388128589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 52.

The square root of 388128589 is about 19700.9793918983. The cubic root of 388128589 is about 729.4438680445.

The spelling of 388128589 in words is "three hundred eighty-eight million, one hundred twenty-eight thousand, five hundred eighty-nine".