428887618 has 16 divisors (see below), whose sum is σ = 651581280. Its totient is φ = 211701600.

The previous prime is 428887597. The next prime is 428887631. The reversal of 428887618 is 816788824.

It is a happy number.

It is a super-3 number, since 3×428887618³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142873 + ... + 145843.

It is an arithmetic number, because the mean of its divisors is an integer number (40723830).

Almost surely, 2^428887618 is an apocalyptic number.

428887618 is a deficient number, since it is larger than the sum of its proper divisors (222693662).

428887618 is a wasteful number, since it uses less digits than its factorization.

428887618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873.

The product of its digits is 1376256, while the sum is 52.

The square root of 428887618 is about 20709.6020724687. The cubic root of 428887618 is about 754.1328101580.

The spelling of 428887618 in words is "four hundred twenty-eight million, eight hundred eighty-seven thousand, six hundred eighteen".