428913818 has 4 divisors (see below), whose sum is σ = 643370730. Its totient is φ = 214456908.

The previous prime is 428913811. The next prime is 428913827. The reversal of 428913818 is 818319824.

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., 279658729 + 149255089 = 16723^2 + 12217^2 .

It is not an unprimeable number, because it can be changed into a prime (428913811) 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, 107228453 + ... + 107228456.

Almost surely, 2^428913818 is an apocalyptic number.

428913818 is a deficient number, since it is larger than the sum of its proper divisors (214456912).

428913818 is a wasteful number, since it uses less digits than its factorization.

428913818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214456911.

The product of its digits is 110592, while the sum is 44.

The square root of 428913818 is about 20710.2346196271. The cubic root of 428913818 is about 754.1481660667.

The spelling of 428913818 in words is "four hundred twenty-eight million, nine hundred thirteen thousand, eight hundred eighteen".