428503 has 2 divisors, whose sum is σ = 428504. Its totient is φ = 428502.

The previous prime is 428489. The next prime is 428509. The reversal of 428503 is 305824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428503 - 2⁵ = 428471 is a prime.

It is a super-2 number, since 2×428503² = 367229642018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214251 + 214252.

It is an arithmetic number, because the mean of its divisors is an integer number (214252).

2⁴²⁸⁵⁰³ is an apocalyptic number.

428503 is a deficient number, since it is larger than the sum of its proper divisors (1).

428503 is an equidigital number, since it uses as much as digits as its factorization.

428503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 428503 is about 654.6014054369. The cubic root of 428503 is about 75.3907312235.

The spelling of 428503 in words is "four hundred twenty-eight thousand, five hundred three".