428479547 has 4 divisors (see below), whose sum is σ = 428795736. Its totient is φ = 428163360.

The previous prime is 428479537. The next prime is 428479549. The reversal of 428479547 is 745974824.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 428479547 - 2⁶ = 428479483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428479495 and 428479504.

It is not an unprimeable number, because it can be changed into a prime (428479549) 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, 156053 + ... + 158774.

It is an arithmetic number, because the mean of its divisors is an integer number (107198934).

Almost surely, 2^428479547 is an apocalyptic number.

428479547 is a deficient number, since it is larger than the sum of its proper divisors (316189).

428479547 is a wasteful number, since it uses less digits than its factorization.

428479547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316188.

The product of its digits is 2257920, while the sum is 50.

The square root of 428479547 is about 20699.7475105374. The cubic root of 428479547 is about 753.8935575972.

The spelling of 428479547 in words is "four hundred twenty-eight million, four hundred seventy-nine thousand, five hundred forty-seven".