428905905 has 48 divisors (see below), whose sum is σ = 732251520. Its totient is φ = 214327296.

The previous prime is 428905891. The next prime is 428905907. The reversal of 428905905 is 509509824.

It is not a de Polignac number, because 428905905 - 2¹³ = 428897713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428905907) 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 47 ways as a sum of consecutive naturals, for example, 557361 + ... + 558129.

It is an arithmetic number, because the mean of its divisors is an integer number (15255240).

Almost surely, 2^428905905 is an apocalyptic number.

It is an amenable number.

428905905 is a deficient number, since it is larger than the sum of its proper divisors (303345615).

428905905 is a wasteful number, since it uses less digits than its factorization.

428905905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 428905905 is about 20710.0435779358. The cubic root of 428905905 is about 754.1435282965.

The spelling of 428905905 in words is "four hundred twenty-eight million, nine hundred five thousand, nine hundred five".