428647361 has 4 divisors (see below), whose sum is σ = 428712900. Its totient is φ = 428581824.

The previous prime is 428647321. The next prime is 428647423. The reversal of 428647361 is 163746824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 276889600 + 151757761 = 16640^2 + 12319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428647361 is a prime.

It is a super-3 number, since 3×428647361³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428647321) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21716 + ... + 36453.

It is an arithmetic number, because the mean of its divisors is an integer number (107178225).

Almost surely, 2^428647361 is an apocalyptic number.

It is an amenable number.

428647361 is a deficient number, since it is larger than the sum of its proper divisors (65539).

428647361 is an equidigital number, since it uses as much as digits as its factorization.

428647361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65538.

The product of its digits is 193536, while the sum is 41.

The square root of 428647361 is about 20703.8006414281. The cubic root of 428647361 is about 753.9919655465.

The spelling of 428647361 in words is "four hundred twenty-eight million, six hundred forty-seven thousand, three hundred sixty-one".