428422321 has 16 divisors (see below), whose sum is σ = 462701376. Its totient is φ = 395214336.

The previous prime is 428422303. The next prime is 428422361. The reversal of 428422321 is 123224824.

It is a cyclic number.

It is not a de Polignac number, because 428422321 - 2⁵ = 428422289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428422321.

It is not an unprimeable number, because it can be changed into a prime (428422361) 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 15 ways as a sum of consecutive naturals, for example, 257725 + ... + 259381.

It is an arithmetic number, because the mean of its divisors is an integer number (28918836).

Almost surely, 2^428422321 is an apocalyptic number.

It is an amenable number.

428422321 is a deficient number, since it is larger than the sum of its proper divisors (34279055).

428422321 is a wasteful number, since it uses less digits than its factorization.

428422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968.

The product of its digits is 6144, while the sum is 28.

The square root of 428422321 is about 20698.3651769892. The cubic root of 428422321 is about 753.8599937754.

The spelling of 428422321 in words is "four hundred twenty-eight million, four hundred twenty-two thousand, three hundred twenty-one".