1628879618 has 16 divisors (see below), whose sum is σ = 2468024640. Its totient is φ = 806216496.

The previous prime is 1628879543. The next prime is 1628879641. The reversal of 1628879618 is 8169788261.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 434480 + ... + 438212.

It is an arithmetic number, because the mean of its divisors is an integer number (154251540).

Almost surely, 2^1628879618 is an apocalyptic number.

1628879618 is a deficient number, since it is larger than the sum of its proper divisors (839145022).

1628879618 is a wasteful number, since it uses less digits than its factorization.

1628879618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881.

The product of its digits is 2322432, while the sum is 56.

The square root of 1628879618 is about 40359.3807930697. The cubic root of 1628879618 is about 1176.6022187637.

The spelling of 1628879618 in words is "one billion, six hundred twenty-eight million, eight hundred seventy-nine thousand, six hundred eighteen".