390423 has 8 divisors (see below), whose sum is σ = 567936. Its totient is φ = 236600.

The previous prime is 390421. The next prime is 390433. The reversal of 390423 is 324093.

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 390423 - 2¹ = 390421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390423.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 390423.

It is not an unprimeable number, because it can be changed into a prime (390421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5883 + ... + 5948.

It is an arithmetic number, because the mean of its divisors is an integer number (70992).

2³⁹⁰⁴²³ is an apocalyptic number.

390423 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

390423 is a deficient number, since it is larger than the sum of its proper divisors (177513).

390423 is a wasteful number, since it uses less digits than its factorization.

390423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11845.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 390423 is about 624.8383791029. The cubic root of 390423 is about 73.0878407156.

The spelling of 390423 in words is "three hundred ninety thousand, four hundred twenty-three".