428745772 has 24 divisors (see below), whose sum is σ = 923453216. Its totient is φ = 169613568.

The previous prime is 428745769. The next prime is 428745803. The reversal of 428745772 is 277547824.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588573 + ... + 589300.

Almost surely, 2^428745772 is an apocalyptic number.

It is an amenable number.

428745772 is an abundant number, since it is smaller than the sum of its proper divisors (494707444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428745772 is a wasteful number, since it uses less digits than its factorization.

428745772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177897 (or 1177895 counting only the distinct ones).

The product of its digits is 878080, while the sum is 46.

The square root of 428745772 is about 20706.1771459630. The cubic root of 428745772 is about 754.0496628772.

The spelling of 428745772 in words is "four hundred twenty-eight million, seven hundred forty-five thousand, seven hundred seventy-two".