428488732 has 36 divisors (see below), whose sum is σ = 883354080. Its totient is φ = 181306944.

The previous prime is 428488699. The next prime is 428488733. The reversal of 428488732 is 237884824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428488733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1648 + ... + 29320.

Almost surely, 2^428488732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428488732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441677040).

428488732 is an abundant number, since it is smaller than the sum of its proper divisors (454865348).

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

428488732 is a wasteful number, since it uses less digits than its factorization.

428488732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27770 (or 27761 counting only the distinct ones).

The product of its digits is 688128, while the sum is 46.

The square root of 428488732 is about 20699.9693719580. The cubic root of 428488732 is about 753.8989444454.

The spelling of 428488732 in words is "four hundred twenty-eight million, four hundred eighty-eight thousand, seven hundred thirty-two".