393438 has 16 divisors (see below), whose sum is σ = 821376. Its totient is φ = 125400.

The previous prime is 393413. The next prime is 393451. The reversal of 393438 is 834393.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (51336).

2³⁹³⁴³⁸ is an apocalyptic number.

393438 is an abundant number, since it is smaller than the sum of its proper divisors (427938).

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

393438 is a wasteful number, since it uses less digits than its factorization.

393438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879.

The product of its digits is 7776, while the sum is 30.

The square root of 393438 is about 627.2463630823. The cubic root of 393438 is about 73.2754961779.

The spelling of 393438 in words is "three hundred ninety-three thousand, four hundred thirty-eight".