388431 has 6 divisors (see below), whose sum is σ = 561080. Its totient is φ = 258948.

The previous prime is 388403. The next prime is 388459. The reversal of 388431 is 134883.

It is an interprime number because it is at equal distance from previous prime (388403) and next prime (388459).

It is not a de Polignac number, because 388431 - 2¹¹ = 386383 is a prime.

It is a super-2 number, since 2×388431² = 301757283522, which contains 22 as substring.

It is a Duffinian number.

388431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 388395 and 388404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388471) 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 5 ways as a sum of consecutive naturals, for example, 21571 + ... + 21588.

2³⁸⁸⁴³¹ is an apocalyptic number.

388431 is a deficient number, since it is larger than the sum of its proper divisors (172649).

388431 is a wasteful number, since it uses less digits than its factorization.

388431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43165 (or 43162 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 388431 is about 623.2423284726. The cubic root of 388431 is about 72.9633267975.

The spelling of 388431 in words is "three hundred eighty-eight thousand, four hundred thirty-one".