428125805 has 8 divisors (see below), whose sum is σ = 515995800. Its totient is φ = 341004096.

The previous prime is 428125799. The next prime is 428125847. The reversal of 428125805 is 508521824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 168948004 + 259177801 = 12998^2 + 16099^2 .

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 428125805 - 2⁶ = 428125741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185810 + ... + 188099.

It is an arithmetic number, because the mean of its divisors is an integer number (64499475).

Almost surely, 2^428125805 is an apocalyptic number.

It is an amenable number.

428125805 is a deficient number, since it is larger than the sum of its proper divisors (87869995).

428125805 is a wasteful number, since it uses less digits than its factorization.

428125805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374143.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 428125805 is about 20691.2011492808. The cubic root of 428125805 is about 753.6860352549.

The spelling of 428125805 in words is "four hundred twenty-eight million, one hundred twenty-five thousand, eight hundred five".