390424 has 16 divisors (see below), whose sum is σ = 752400. Its totient is φ = 189792.

The previous prime is 390421. The next prime is 390433. The reversal of 390424 is 424093.

It is a junction number, because it is equal to n+sod(n) for n = 390395 and 390404.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 364 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (47025).

2³⁹⁰⁴²⁴ is an apocalyptic number.

It is an amenable number.

390424 is a deficient number, since it is larger than the sum of its proper divisors (361976).

390424 is a wasteful number, since it uses less digits than its factorization.

390424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 390424 is about 624.8391793094. The cubic root of 390424 is about 73.0879031161.

The spelling of 390424 in words is "three hundred ninety thousand, four hundred twenty-four".