428440390603 has 2 divisors, whose sum is σ = 428440390604. Its totient is φ = 428440390602.

The previous prime is 428440390601. The next prime is 428440390627. The reversal of 428440390603 is 306093044824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428440390603 - 2¹ = 428440390601 is a prime.

It is a super-2 number, since 2×428440390603² (a number of 24 digits) contains 22 as substring.

Together with 428440390601, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 428440390603.

It is not a weakly prime, because it can be changed into another prime (428440390601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214220195301 + 214220195302.

It is an arithmetic number, because the mean of its divisors is an integer number (214220195302).

Almost surely, 2^428440390603 is an apocalyptic number.

428440390603 is a deficient number, since it is larger than the sum of its proper divisors (1).

428440390603 is an equidigital number, since it uses as much as digits as its factorization.

428440390603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 428440390603 in words is "four hundred twenty-eight billion, four hundred forty million, three hundred ninety thousand, six hundred three".