428809438 has 16 divisors (see below), whose sum is σ = 650830176. Its totient is φ = 211874400.

The previous prime is 428809429. The next prime is 428809439. The reversal of 428809438 is 834908824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428809439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122095 + ... + 125557.

It is an arithmetic number, because the mean of its divisors is an integer number (40676886).

Almost surely, 2^428809438 is an apocalyptic number.

428809438 is a deficient number, since it is larger than the sum of its proper divisors (222020738).

428809438 is a wasteful number, since it uses less digits than its factorization.

428809438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179.

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 428809438 is about 20707.7144562117. The cubic root of 428809438 is about 754.0869848777.

The spelling of 428809438 in words is "four hundred twenty-eight million, eight hundred nine thousand, four hundred thirty-eight".