390404003 has 16 divisors (see below), whose sum is σ = 448070400. Its totient is φ = 336850080.

The previous prime is 390403999. The next prime is 390404023. The reversal of 390404003 is 300404093.

It is not a de Polignac number, because 390404003 - 2² = 390403999 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 390404003.

It is not an unprimeable number, because it can be changed into a prime (390404023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8450 + ... + 29192.

It is an arithmetic number, because the mean of its divisors is an integer number (28004400).

Almost surely, 2^390404003 is an apocalyptic number.

390404003 is a deficient number, since it is larger than the sum of its proper divisors (57666397).

390404003 is a wasteful number, since it uses less digits than its factorization.

390404003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20842.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 390404003 is about 19758.6437540637. The cubic root of 390404003 is about 730.8665527294.

Adding to 390404003 its reverse (300404093), we get a palindrome (690808096).

The spelling of 390404003 in words is "three hundred ninety million, four hundred four thousand, three".