428917646 has 8 divisors (see below), whose sum is σ = 659068704. Its totient is φ = 209228080.

The previous prime is 428917637. The next prime is 428917649. The reversal of 428917646 is 646719824.

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

It is a self number, because there is not a number n which added to its sum of digits gives 428917646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428917649) 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, 2615270 + ... + 2615433.

It is an arithmetic number, because the mean of its divisors is an integer number (82383588).

Almost surely, 2^428917646 is an apocalyptic number.

428917646 is a deficient number, since it is larger than the sum of its proper divisors (230151058).

428917646 is a wasteful number, since it uses less digits than its factorization.

428917646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5230746.

The product of its digits is 580608, while the sum is 47.

The square root of 428917646 is about 20710.3270374951. The cubic root of 428917646 is about 754.1504096181.

The spelling of 428917646 in words is "four hundred twenty-eight million, nine hundred seventeen thousand, six hundred forty-six".