203430404 has 6 divisors (see below), whose sum is σ = 356003214. Its totient is φ = 101715200.

The previous prime is 203430379. The next prime is 203430413. The reversal of 203430404 is 404034302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 76912900 = 11248^2 + 8770^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25428797 + ... + 25428804.

It is an arithmetic number, because the mean of its divisors is an integer number (59333869).

Almost surely, 2^203430404 is an apocalyptic number.

It is an amenable number.

203430404 is a deficient number, since it is larger than the sum of its proper divisors (152572810).

203430404 is a wasteful number, since it uses less digits than its factorization.

203430404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50857605 (or 50857603 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 203430404 is about 14262.9030705533. The cubic root of 203430404 is about 588.1281324108.

Adding to 203430404 its reverse (404034302), we get a palindrome (607464706).

The spelling of 203430404 in words is "two hundred three million, four hundred thirty thousand, four hundred four".