428326820 has 12 divisors (see below), whose sum is σ = 899486364. Its totient is φ = 171330720.

The previous prime is 428326819. The next prime is 428326831. The reversal of 428326820 is 28623824.

It can be written as a sum of positive squares in 2 ways, for example, as 282979684 + 145347136 = 16822^2 + 12056^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10708151 + ... + 10708190.

It is an arithmetic number, because the mean of its divisors is an integer number (74957197).

Almost surely, 2^428326820 is an apocalyptic number.

It is an amenable number.

428326820 is an abundant number, since it is smaller than the sum of its proper divisors (471159544).

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

428326820 is a wasteful number, since it uses less digits than its factorization.

428326820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21416350 (or 21416348 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 428326820 is about 20696.0580787743. The cubic root of 428326820 is about 753.8039744926.

The spelling of 428326820 in words is "four hundred twenty-eight million, three hundred twenty-six thousand, eight hundred twenty".