390069 has 8 divisors (see below), whose sum is σ = 577920. Its totient is φ = 260028.

The previous prime is 390067. The next prime is 390077. The reversal of 390069 is 960093.

It is not a de Polignac number, because 390069 - 2¹ = 390067 is a prime.

It is a super-2 number, since 2×390069² = 304307649522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 14447 = 390069 / (3 + 9 + 0 + 0 + 6 + 9).

390069 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7197 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (72240).

2³⁹⁰⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

390069 is a deficient number, since it is larger than the sum of its proper divisors (187851).

390069 is a wasteful number, since it uses less digits than its factorization.

390069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456 (or 14450 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 390069 is about 624.5550416096. Note that the first 3 decimals coincide. The cubic root of 390069 is about 73.0657442379.

It can be divided in two parts, 3900 and 69, that added together give a square (3969 = 63²).

The spelling of 390069 in words is "three hundred ninety thousand, sixty-nine".