388739 has 8 divisors (see below), whose sum is σ = 443520. Its totient is φ = 337536.

The previous prime is 388727. The next prime is 388757. The reversal of 388739 is 937883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 388739 - 2⁸ = 388483 is a prime.

It is a super-2 number, since 2×388739² = 302236020242, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (388789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659 + ... + 1100.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2³⁸⁸⁷³⁹ is an apocalyptic number.

388739 is a deficient number, since it is larger than the sum of its proper divisors (54781).

388739 is a wasteful number, since it uses less digits than its factorization.

388739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789.

The product of its digits is 36288, while the sum is 38.

The square root of 388739 is about 623.4893744083. The cubic root of 388739 is about 72.9826067275.

The spelling of 388739 in words is "three hundred eighty-eight thousand, seven hundred thirty-nine".