428945519 has 2 divisors, whose sum is σ = 428945520. Its totient is φ = 428945518.

The previous prime is 428945507. The next prime is 428945527. The reversal of 428945519 is 915549824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428945519 - 2¹² = 428941423 is a prime.

It is a super-2 number, since 2×428945519² = 367988516540358722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428945579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214472759 + 214472760.

It is an arithmetic number, because the mean of its divisors is an integer number (214472760).

Almost surely, 2^428945519 is an apocalyptic number.

428945519 is a deficient number, since it is larger than the sum of its proper divisors (1).

428945519 is an equidigital number, since it uses as much as digits as its factorization.

428945519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 47.

The square root of 428945519 is about 20710.9999517165. Note that the first 4 decimals coincide. The cubic root of 428945519 is about 754.1667452940.

The spelling of 428945519 in words is "four hundred twenty-eight million, nine hundred forty-five thousand, five hundred nineteen".