393478 has 4 divisors (see below), whose sum is σ = 590220. Its totient is φ = 196738.

The previous prime is 393473. The next prime is 393479. The reversal of 393478 is 874393.

393478 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874393 = 13 ⋅67261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98368 + ... + 98371.

It is an arithmetic number, because the mean of its divisors is an integer number (147555).

2³⁹³⁴⁷⁸ is an apocalyptic number.

393478 is a deficient number, since it is larger than the sum of its proper divisors (196742).

393478 is a wasteful number, since it uses less digits than its factorization.

393478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196741.

The product of its digits is 18144, while the sum is 34.

The square root of 393478 is about 627.2782476700. The cubic root of 393478 is about 73.2779793481.

The spelling of 393478 in words is "three hundred ninety-three thousand, four hundred seventy-eight".