428674647 has 4 divisors (see below), whose sum is σ = 571566200. Its totient is φ = 285783096.

The previous prime is 428674627. The next prime is 428674651. The reversal of 428674647 is 746476824.

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

It is not a de Polignac number, because 428674647 - 2⁶ = 428674583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428674596 and 428674605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428674627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71445772 + ... + 71445777.

It is an arithmetic number, because the mean of its divisors is an integer number (142891550).

Almost surely, 2^428674647 is an apocalyptic number.

428674647 is a deficient number, since it is larger than the sum of its proper divisors (142891553).

428674647 is a wasteful number, since it uses less digits than its factorization.

428674647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142891552.

The product of its digits is 1806336, while the sum is 48.

The square root of 428674647 is about 20704.4595920782. The cubic root of 428674647 is about 754.0079639251.

The spelling of 428674647 in words is "four hundred twenty-eight million, six hundred seventy-four thousand, six hundred forty-seven".