428487646 has 8 divisors (see below), whose sum is σ = 652324680. Its totient is φ = 211046088.

The previous prime is 428487643. The next prime is 428487671. The reversal of 428487646 is 646784824.

It is a happy number.

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 428487646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428487643) 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, 1598701 + ... + 1598968.

It is an arithmetic number, because the mean of its divisors is an integer number (81540585).

Almost surely, 2^428487646 is an apocalyptic number.

428487646 is a deficient number, since it is larger than the sum of its proper divisors (223837034).

428487646 is a wasteful number, since it uses less digits than its factorization.

428487646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197738.

The product of its digits is 2064384, while the sum is 49.

The square root of 428487646 is about 20699.9431400185. The cubic root of 428487646 is about 753.8983075287.

The spelling of 428487646 in words is "four hundred twenty-eight million, four hundred eighty-seven thousand, six hundred forty-six".