428342868 has 36 divisors (see below), whose sum is σ = 1084186740. Its totient is φ = 142592256.

The previous prime is 428342843. The next prime is 428342881. The reversal of 428342868 is 868243824.

It can be written as a sum of positive squares in 2 ways, for example, as 295908804 + 132434064 = 17202^2 + 11508^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×428342868² = 366955225132930848, which contains 22 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 21228 + ... + 36156.

Almost surely, 2^428342868 is an apocalyptic number.

It is an amenable number.

428342868 is an abundant number, since it is smaller than the sum of its proper divisors (655843872).

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

428342868 is a wasteful number, since it uses less digits than its factorization.

428342868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15736 (or 15731 counting only the distinct ones).

The product of its digits is 589824, while the sum is 45.

The square root of 428342868 is about 20696.4457818245. The cubic root of 428342868 is about 753.8133885619.

The spelling of 428342868 in words is "four hundred twenty-eight million, three hundred forty-two thousand, eight hundred sixty-eight".