428872634 has 16 divisors (see below), whose sum is σ = 684690408. Its totient is φ = 200773632.

The previous prime is 428872627. The next prime is 428872643. The reversal of 428872634 is 436278824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 424483609 + 4389025 = 20603^2 + 2095^2 .

It is a nialpdrome in base 12.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26117 + ... + 39240.

Almost surely, 2^428872634 is an apocalyptic number.

428872634 is a deficient number, since it is larger than the sum of its proper divisors (255817774).

428872634 is a wasteful number, since it uses less digits than its factorization.

428872634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65569.

The product of its digits is 516096, while the sum is 44.

The square root of 428872634 is about 20709.2403047529. The cubic root of 428872634 is about 754.1240277037.

The spelling of 428872634 in words is "four hundred twenty-eight million, eight hundred seventy-two thousand, six hundred thirty-four".