428945522 has 8 divisors (see below), whose sum is σ = 643534956. Its totient is φ = 214433872.

The previous prime is 428945519. The next prime is 428945527. The reversal of 428945522 is 225549824.

It is a happy number.

It is a Cunningham number, because it is equal to 20711²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 428945521 + 1 = 20711^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 428945522.

It is not an unprimeable number, because it can be changed into a prime (428945527) 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, 2813 + ... + 29424.

Almost surely, 2^428945522 is an apocalyptic number.

428945522 is a deficient number, since it is larger than the sum of its proper divisors (214589434).

428945522 is a wasteful number, since it uses less digits than its factorization.

428945522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38892.

The product of its digits is 230400, while the sum is 41.

The square root of 428945522 is about 20711.0000241418. Note that the first 4 decimals coincide. The cubic root of 428945522 is about 754.1667470522.

The spelling of 428945522 in words is "four hundred twenty-eight million, nine hundred forty-five thousand, five hundred twenty-two".