390346 has 12 divisors (see below), whose sum is σ = 643986. Its totient is φ = 177320.

The previous prime is 390343. The next prime is 390347. The reversal of 390346 is 643093.

It can be written as a sum of positive squares in only one way, i.e., 314721 + 75625 = 561^2 + 275^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 390346.

It is not an unprimeable number, because it can be changed into a prime (390343) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 565 + ... + 1048.

2³⁹⁰³⁴⁶ is an apocalyptic number.

390346 is a deficient number, since it is larger than the sum of its proper divisors (253640).

390346 is a wasteful number, since it uses less digits than its factorization.

390346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 390346 is about 624.7767601312. The cubic root of 390346 is about 73.0830355566.

It can be divided in two parts, 390 and 346, that multiplied together give a triangular number (134940 = T₅₁₉).

The spelling of 390346 in words is "three hundred ninety thousand, three hundred forty-six".