428443732 has 12 divisors (see below), whose sum is σ = 763923636. Its totient is φ = 210179840.

The previous prime is 428443721. The next prime is 428443733. The reversal of 428443732 is 237344824.

It can be written as a sum of positive squares in 2 ways, for example, as 155401156 + 273042576 = 12466^2 + 16524^2 .

It is a junction number, because it is equal to n+sod(n) for n = 428443691 and 428443700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428443733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010269 + ... + 1010692.

It is an arithmetic number, because the mean of its divisors is an integer number (63660303).

Almost surely, 2^428443732 is an apocalyptic number.

It is an amenable number.

428443732 is a deficient number, since it is larger than the sum of its proper divisors (335479904).

428443732 is a wasteful number, since it uses less digits than its factorization.

428443732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021018 (or 2021016 counting only the distinct ones).

The product of its digits is 129024, while the sum is 37.

The square root of 428443732 is about 20698.8823852883. The cubic root of 428443732 is about 753.8725519659.

The spelling of 428443732 in words is "four hundred twenty-eight million, four hundred forty-three thousand, seven hundred thirty-two".