428646508 has 12 divisors (see below), whose sum is σ = 750764392. Its totient is φ = 214142400.

The previous prime is 428646433. The next prime is 428646509. The reversal of 428646508 is 805646824.

It is not an unprimeable number, because it can be changed into a prime (428646509) 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, 39810 + ... + 49417.

Almost surely, 2^428646508 is an apocalyptic number.

It is an amenable number.

428646508 is a deficient number, since it is larger than the sum of its proper divisors (322117884).

428646508 is a wasteful number, since it uses less digits than its factorization.

428646508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90432 (or 90430 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The square root of 428646508 is about 20703.7800413354. The cubic root of 428646508 is about 753.9914654030.

The spelling of 428646508 in words is "four hundred twenty-eight million, six hundred forty-six thousand, five hundred eight".