428071684 has 36 divisors (see below), whose sum is σ = 779429532. Its totient is φ = 205701120.

The previous prime is 428071681. The next prime is 428071711. The reversal of 428071684 is 486170824.

It can be written as a sum of positive squares in 2 ways, for example, as 303526084 + 124545600 = 17422^2 + 11160^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428071681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 741604 + ... + 742180.

Almost surely, 2^428071684 is an apocalyptic number.

It is an amenable number.

428071684 is a deficient number, since it is larger than the sum of its proper divisors (351357848).

428071684 is a wasteful number, since it uses less digits than its factorization.

428071684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 428071684 is about 20689.8932815034. The cubic root of 428071684 is about 753.6542751504.

The spelling of 428071684 in words is "four hundred twenty-eight million, seventy-one thousand, six hundred eighty-four".