390426 has 8 divisors (see below), whose sum is σ = 780864. Its totient is φ = 130140.

The previous prime is 390421. The next prime is 390433. The reversal of 390426 is 624093.

390426 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

390426 is an admirable number.

It is a super-2 number, since 2×390426² = 304864922952, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 390396 and 390405.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 390426.

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

390426 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, 32530 + ... + 32541.

It is an arithmetic number, because the mean of its divisors is an integer number (97608).

2³⁹⁰⁴²⁶ is an apocalyptic number.

390426 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.

390426 is a wasteful number, since it uses less digits than its factorization.

390426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65076.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 390426 is about 624.8407797191. The cubic root of 390426 is about 73.0880279168.

The spelling of 390426 in words is "three hundred ninety thousand, four hundred twenty-six".