427728569 has 8 divisors (see below), whose sum is σ = 443439360. Its totient is φ = 412081936.

The previous prime is 427728559. The next prime is 427728577. The reversal of 427728569 is 965827724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427728569 is a prime.

It is a super-2 number, since 2×427728569² = 365903457477575522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427728559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249 + ... + 29334.

It is an arithmetic number, because the mean of its divisors is an integer number (55429920).

Almost surely, 2^427728569 is an apocalyptic number.

It is an amenable number.

427728569 is a deficient number, since it is larger than the sum of its proper divisors (15710791).

427728569 is a wasteful number, since it uses less digits than its factorization.

427728569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32079.

The product of its digits is 1693440, while the sum is 50.

The square root of 427728569 is about 20681.5997688767. The cubic root of 427728569 is about 753.4528609038.

The spelling of 427728569 in words is "four hundred twenty-seven million, seven hundred twenty-eight thousand, five hundred sixty-nine".