390706 has 4 divisors (see below), whose sum is σ = 586062. Its totient is φ = 195352.

The previous prime is 390703. The next prime is 390707. The reversal of 390706 is 607093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 390625 + 81 = 625^2 + 9^2 .

It is not an unprimeable number, because it can be changed into a prime (390703) 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 as a sum of consecutive naturals, namely, 97675 + ... + 97678.

2³⁹⁰⁷⁰⁶ is an apocalyptic number.

390706 is a deficient number, since it is larger than the sum of its proper divisors (195356).

390706 is a wasteful number, since it uses less digits than its factorization.

390706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195355.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 390706 is about 625.0647966411. The cubic root of 390706 is about 73.1054958088.

Adding to 390706 its reverse (607093), we get a palindrome (997799).

It can be divided in two parts, 3 and 90706, that added together give a palindrome (90709).

The spelling of 390706 in words is "three hundred ninety thousand, seven hundred six".