428569616 has 20 divisors (see below), whose sum is σ = 833016252. Its totient is φ = 213597696.

The previous prime is 428569601. The next prime is 428569619. The reversal of 428569616 is 616965824.

It can be written as a sum of positive squares in 2 ways, for example, as 48163600 + 380406016 = 6940^2 + 19504^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (428569619) 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, 37781 + ... + 47796.

Almost surely, 2^428569616 is an apocalyptic number.

It is an amenable number.

428569616 is a deficient number, since it is larger than the sum of its proper divisors (404446636).

428569616 is a wasteful number, since it uses less digits than its factorization.

428569616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85898 (or 85892 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The square root of 428569616 is about 20701.9230024653. The cubic root of 428569616 is about 753.9463782293.

It can be divided in two parts, 42 and 8569616, that added together give a palindrome (8569658).

The spelling of 428569616 in words is "four hundred twenty-eight million, five hundred sixty-nine thousand, six hundred sixteen".