428133667 has 4 divisors (see below), whose sum is σ = 461067040. Its totient is φ = 395200296.

The previous prime is 428133649. The next prime is 428133679. The reversal of 428133667 is 766331824.

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

It is a cyclic number.

It is not a de Polignac number, because 428133667 - 2¹⁵ = 428100899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428133067) 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 3 ways as a sum of consecutive naturals, for example, 16466667 + ... + 16466692.

It is an arithmetic number, because the mean of its divisors is an integer number (115266760).

Almost surely, 2^428133667 is an apocalyptic number.

428133667 is a deficient number, since it is larger than the sum of its proper divisors (32933373).

428133667 is a wasteful number, since it uses less digits than its factorization.

428133667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32933372.

The product of its digits is 145152, while the sum is 40.

The square root of 428133667 is about 20691.3911325459. The cubic root of 428133667 is about 753.6906487301.

The spelling of 428133667 in words is "four hundred twenty-eight million, one hundred thirty-three thousand, six hundred sixty-seven".