203408428 has 12 divisors (see below), whose sum is σ = 356067712. Its totient is φ = 101674800.

The previous prime is 203408423. The next prime is 203408461. The reversal of 203408428 is 824804302.

It is a self number, because there is not a number n which added to its sum of digits gives 203408428.

It is not an unprimeable number, because it can be changed into a prime (203408423) 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 3 ways as a sum of consecutive naturals, for example, 17653 + ... + 26803.

Almost surely, 2^203408428 is an apocalyptic number.

It is an amenable number.

203408428 is a deficient number, since it is larger than the sum of its proper divisors (152659284).

203408428 is a wasteful number, since it uses less digits than its factorization.

203408428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14712 (or 14710 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 203408428 is about 14262.1326595990. The cubic root of 203408428 is about 588.1069537193.

The spelling of 203408428 in words is "two hundred three million, four hundred eight thousand, four hundred twenty-eight".