390345 has 16 divisors (see below), whose sum is σ = 637632. Its totient is φ = 203840.

The previous prime is 390343. The next prime is 390347. The reversal of 390345 is 543093.

It is an interprime number because it is at equal distance from previous prime (390343) and next prime (390347).

It is not a de Polignac number, because 390345 - 2¹ = 390343 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 550 + ... + 1040.

It is an arithmetic number, because the mean of its divisors is an integer number (39852).

2³⁹⁰³⁴⁵ is an apocalyptic number.

It is an amenable number.

390345 is a deficient number, since it is larger than the sum of its proper divisors (247287).

390345 is a wasteful number, since it uses less digits than its factorization.

390345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 390345 is about 624.7759598448. The cubic root of 390345 is about 73.0829731478.

The spelling of 390345 in words is "three hundred ninety thousand, three hundred forty-five".