428639345 has 8 divisors (see below), whose sum is σ = 516266880. Its totient is φ = 341645040.

The previous prime is 428639327. The next prime is 428639353. The reversal of 428639345 is 543936824.

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

It is not a de Polignac number, because 428639345 - 2²⁸ = 160203889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428639296 and 428639305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156815 + ... + 159524.

It is an arithmetic number, because the mean of its divisors is an integer number (64533360).

Almost surely, 2^428639345 is an apocalyptic number.

It is an amenable number.

428639345 is a deficient number, since it is larger than the sum of its proper divisors (87627535).

428639345 is a wasteful number, since it uses less digits than its factorization.

428639345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316615.

The product of its digits is 622080, while the sum is 44.

The square root of 428639345 is about 20703.6070528785. The cubic root of 428639345 is about 753.9872654614.

The spelling of 428639345 in words is "four hundred twenty-eight million, six hundred thirty-nine thousand, three hundred forty-five".