1628244618 has 96 divisors (see below), whose sum is σ = 4450541760. Its totient is φ = 390378240.

The previous prime is 1628244571. The next prime is 1628244637. The reversal of 1628244618 is 8164428261.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1628244618.

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 47 ways as a sum of consecutive naturals, for example, 22678 + ... + 61406.

It is an arithmetic number, because the mean of its divisors is an integer number (46359810).

Almost surely, 2^1628244618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1628244618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225270880).

1628244618 is an abundant number, since it is smaller than the sum of its proper divisors (2822297142).

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

1628244618 is a wasteful number, since it uses less digits than its factorization.

1628244618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38772 (or 38765 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 1628244618 is about 40351.5132058266. The cubic root of 1628244618 is about 1176.4493039401.

The spelling of 1628244618 in words is "one billion, six hundred twenty-eight million, two hundred forty-four thousand, six hundred eighteen".