428580805 has 8 divisors (see below), whose sum is σ = 528197112. Its totient is φ = 333597888.

The previous prime is 428580787. The next prime is 428580811. The reversal of 428580805 is 508085824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 276823044 + 151757761 = 16638^2 + 12319^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428580805 - 2⁵ = 428580773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1158142 + ... + 1158511.

It is an arithmetic number, because the mean of its divisors is an integer number (66024639).

Almost surely, 2^428580805 is an apocalyptic number.

It is an amenable number.

428580805 is a deficient number, since it is larger than the sum of its proper divisors (99616307).

428580805 is a wasteful number, since it uses less digits than its factorization.

428580805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316695.

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 428580805 is about 20702.1932412969. The cubic root of 428580805 is about 753.9529394602.

The spelling of 428580805 in words is "four hundred twenty-eight million, five hundred eighty thousand, eight hundred five".