428665005 has 48 divisors (see below), whose sum is σ = 756946944. Its totient is φ = 224380800.

The previous prime is 428664989. The next prime is 428665033. The reversal of 428665005 is 500566824.

It is not a de Polignac number, because 428665005 - 2⁴ = 428664989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 611155 + ... + 611855.

It is an arithmetic number, because the mean of its divisors is an integer number (15769728).

Almost surely, 2^428665005 is an apocalyptic number.

428665005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428665005 is a deficient number, since it is larger than the sum of its proper divisors (328281939).

428665005 is a wasteful number, since it uses less digits than its factorization.

428665005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 428665005 is about 20704.2267423828. The cubic root of 428665005 is about 754.0023106872.

The spelling of 428665005 in words is "four hundred twenty-eight million, six hundred sixty-five thousand, five".