393490 has 24 divisors (see below), whose sum is σ = 754380. Its totient is φ = 147744.

The previous prime is 393487. The next prime is 393517. The reversal of 393490 is 94393.

It can be written as a sum of positive squares in 2 ways, for example, as 393129 + 361 = 627^2 + 19^2 .

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 3556 + ... + 3664.

2³⁹³⁴⁹⁰ is an apocalyptic number.

393490 is a deficient number, since it is larger than the sum of its proper divisors (360890).

393490 is a wasteful number, since it uses less digits than its factorization.

393490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 393490 is about 627.2878127303. The cubic root of 393490 is about 73.2787242664.

The spelling of 393490 in words is "three hundred ninety-three thousand, four hundred ninety".