390939 has 8 divisors (see below), whose sum is σ = 525312. Its totient is φ = 258600.

The previous prime is 390893. The next prime is 390953. The reversal of 390939 is 939093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390939 - 2¹¹ = 388891 is a prime.

390939 is a lucky number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (390959) 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, 22 + ... + 884.

It is an arithmetic number, because the mean of its divisors is an integer number (65664).

2³⁹⁰⁹³⁹ is an apocalyptic number.

390939 is a deficient number, since it is larger than the sum of its proper divisors (134373).

390939 is a wasteful number, since it uses less digits than its factorization.

390939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017.

The product of its (nonzero) digits is 6561, while the sum is 33.

The square root of 390939 is about 625.2511495391. The cubic root of 390939 is about 73.1200252295.

The spelling of 390939 in words is "three hundred ninety thousand, nine hundred thirty-nine".