428109618 has 16 divisors (see below), whose sum is σ = 877103136. Its totient is φ = 139222560.

The previous prime is 428109581. The next prime is 428109637. The reversal of 428109618 is 816901824.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869896 + ... + 870387.

It is an arithmetic number, because the mean of its divisors is an integer number (54818946).

Almost surely, 2^428109618 is an apocalyptic number.

428109618 is an abundant number, since it is smaller than the sum of its proper divisors (448993518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428109618 is a wasteful number, since it uses less digits than its factorization.

428109618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740329.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 428109618 is about 20690.8099889782. The cubic root of 428109618 is about 753.6765364351.

The spelling of 428109618 in words is "four hundred twenty-eight million, one hundred nine thousand, six hundred eighteen".