16428403 has 2 divisors, whose sum is σ = 16428404. Its totient is φ = 16428402.

The previous prime is 16428359. The next prime is 16428437. The reversal of 16428403 is 30482461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16428403 is a prime.

It is not a weakly prime, because it can be changed into another prime (16428493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8214201 + 8214202.

It is an arithmetic number, because the mean of its divisors is an integer number (8214202).

Almost surely, 2^16428403 is an apocalyptic number.

16428403 is a deficient number, since it is larger than the sum of its proper divisors (1).

16428403 is an equidigital number, since it uses as much as digits as its factorization.

16428403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 16428403 is about 4053.1966396907. The cubic root of 16428403 is about 254.2134059108.

The spelling of 16428403 in words is "sixteen million, four hundred twenty-eight thousand, four hundred three".