428115565 has 8 divisors (see below), whose sum is σ = 513871128. Its totient is φ = 342404160.

The previous prime is 428115559. The next prime is 428115593. The reversal of 428115565 is 565511824.

It can be written as a sum of positive squares in 4 ways, for example, as 95199049 + 332916516 = 9757^2 + 18246^2 .

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

It is not a de Polignac number, because 428115565 - 2³ = 428115557 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16579 + ... + 33631.

It is an arithmetic number, because the mean of its divisors is an integer number (64233891).

Almost surely, 2^428115565 is an apocalyptic number.

It is an amenable number.

428115565 is a deficient number, since it is larger than the sum of its proper divisors (85755563).

428115565 is a wasteful number, since it uses less digits than its factorization.

428115565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22079.

The product of its digits is 48000, while the sum is 37.

The square root of 428115565 is about 20690.9536996244. The cubic root of 428115565 is about 753.6800262684.

The spelling of 428115565 in words is "four hundred twenty-eight million, one hundred fifteen thousand, five hundred sixty-five".