390434423 has 4 divisors (see below), whose sum is σ = 390474480. Its totient is φ = 390394368.

The previous prime is 390434377. The next prime is 390434437. The reversal of 390434423 is 324434093.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 390434423 - 2¹⁰ = 390433399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 390434423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390434483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111 + ... + 28407.

It is an arithmetic number, because the mean of its divisors is an integer number (97618620).

Almost surely, 2^390434423 is an apocalyptic number.

390434423 is a deficient number, since it is larger than the sum of its proper divisors (40057).

390434423 is a wasteful number, since it uses less digits than its factorization.

390434423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 390434423 is about 19759.4135287462. The cubic root of 390434423 is about 730.8855351023.

The spelling of 390434423 in words is "three hundred ninety million, four hundred thirty-four thousand, four hundred twenty-three".