428911469 has 4 divisors (see below), whose sum is σ = 490184544. Its totient is φ = 367638396.

The previous prime is 428911459. The next prime is 428911471. The reversal of 428911469 is 964119824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428911469 - 2²⁰ = 427862893 is a prime.

It is a super-2 number, since 2×428911469² = 367930096479475922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428911459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30636527 + ... + 30636540.

It is an arithmetic number, because the mean of its divisors is an integer number (122546136).

Almost surely, 2^428911469 is an apocalyptic number.

It is an amenable number.

428911469 is a deficient number, since it is larger than the sum of its proper divisors (61273075).

428911469 is an equidigital number, since it uses as much as digits as its factorization.

428911469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61273074.

The product of its digits is 124416, while the sum is 44.

The square root of 428911469 is about 20710.1779084584. The cubic root of 428911469 is about 754.1467893353.

The spelling of 428911469 in words is "four hundred twenty-eight million, nine hundred eleven thousand, four hundred sixty-nine".