1018201728 has 64 divisors (see below), whose sum is σ = 2729985120. Its totient is φ = 336215040.

The previous prime is 1018201711. The next prime is 1018201729. The reversal of 1018201728 is 8271028101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1018201695 and 1018201704.

It is not an unprimeable number, because it can be changed into a prime (1018201729) by changing a digit.

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, 28698 + ... + 53478.

Almost surely, 2^1018201728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1018201728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364992560).

1018201728 is an abundant number, since it is smaller than the sum of its proper divisors (1711783392).

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

1018201728 is a wasteful number, since it uses less digits than its factorization.

1018201728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24905 (or 24893 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 1018201728 is about 31909.2733856476. The cubic root of 1018201728 is about 1006.0307990154.

Adding to 1018201728 its reverse (8271028101), we get a palindrome (9289229829).

The spelling of 1018201728 in words is "one billion, eighteen million, two hundred one thousand, seven hundred twenty-eight".