388996729 has 15 divisors (see below), whose sum is σ = 430534965. Its totient is φ = 351463860.

The previous prime is 388996721. The next prime is 388996739. The reversal of 388996729 is 927699883.

It is a happy number.

The square root of 388996729 is 19723.

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

It is not a de Polignac number, because 388996729 - 2³ = 388996721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388996721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2386402 + ... + 2386564.

It is an arithmetic number, because the mean of its divisors is an integer number (28702331).

Almost surely, 2^388996729 is an apocalyptic number.

388996729 is the 19723-rd square number.

388996729 is the 9862-nd centered octagonal number.

It is an amenable number.

388996729 is a deficient number, since it is larger than the sum of its proper divisors (41538236).

388996729 is an frugal number, since it uses more digits than its factorization.

388996729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 174 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 61.

The cubic root of 388996729 is about 729.9873201025.

The spelling of 388996729 in words is "three hundred eighty-eight million, nine hundred ninety-six thousand, seven hundred twenty-nine".