428268634 has 4 divisors (see below), whose sum is σ = 642402954. Its totient is φ = 214134316.

The previous prime is 428268619. The next prime is 428268637. The reversal of 428268634 is 436862824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 384748225 + 43520409 = 19615^2 + 6597^2 .

It is not an unprimeable number, because it can be changed into a prime (428268637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107067157 + ... + 107067160.

Almost surely, 2^428268634 is an apocalyptic number.

428268634 is a deficient number, since it is larger than the sum of its proper divisors (214134320).

428268634 is a wasteful number, since it uses less digits than its factorization.

428268634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214134319.

The product of its digits is 442368, while the sum is 43.

The square root of 428268634 is about 20694.6523043998. The cubic root of 428268634 is about 753.7698394799.

The spelling of 428268634 in words is "four hundred twenty-eight million, two hundred sixty-eight thousand, six hundred thirty-four".