428605617 has 8 divisors (see below), whose sum is σ = 623426400. Its totient is φ = 259760960.

The previous prime is 428605613. The next prime is 428605637. The reversal of 428605617 is 716506824.

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

It is a cyclic number.

It is not a de Polignac number, because 428605617 - 2² = 428605613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428605613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6493992 + ... + 6494057.

It is an arithmetic number, because the mean of its divisors is an integer number (77928300).

Almost surely, 2^428605617 is an apocalyptic number.

It is an amenable number.

428605617 is a deficient number, since it is larger than the sum of its proper divisors (194820783).

428605617 is a wasteful number, since it uses less digits than its factorization.

428605617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12988063.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 428605617 is about 20702.7924928015. The cubic root of 428605617 is about 753.9674888125.

The spelling of 428605617 in words is "four hundred twenty-eight million, six hundred five thousand, six hundred seventeen".