389406 has 8 divisors (see below), whose sum is σ = 778824. Its totient is φ = 129800.

The previous prime is 389401. The next prime is 389437. The reversal of 389406 is 604983.

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

389406 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389401) by changing a digit.

389406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 32445 + ... + 32456.

It is an arithmetic number, because the mean of its divisors is an integer number (97353).

2³⁸⁹⁴⁰⁶ is an apocalyptic number.

389406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389406 is a wasteful number, since it uses less digits than its factorization.

389406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64906.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 389406 is about 624.0240379985. The cubic root of 389406 is about 73.0243241641.

Subtracting from 389406 its sum of digits (30), we obtain a square (389376 = 624²).

The spelling of 389406 in words is "three hundred eighty-nine thousand, four hundred six".