428770418 has 4 divisors (see below), whose sum is σ = 643155630. Its totient is φ = 214385208.

The previous prime is 428770417. The next prime is 428770421. The reversal of 428770418 is 814077824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 421604089 + 7166329 = 20533^2 + 2677^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428770417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107192603 + ... + 107192606.

Almost surely, 2^428770418 is an apocalyptic number.

428770418 is a deficient number, since it is larger than the sum of its proper divisors (214385212).

428770418 is a wasteful number, since it uses less digits than its factorization.

428770418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214385211.

The product of its (nonzero) digits is 100352, while the sum is 41.

The square root of 428770418 is about 20706.7722738238. The cubic root of 428770418 is about 754.0641111844.

The spelling of 428770418 in words is "four hundred twenty-eight million, seven hundred seventy thousand, four hundred eighteen".