1018220544 has 364 divisors, whose sum is σ = 3437860992. Its totient is φ = 298598400.

The previous prime is 1018220519. The next prime is 1018220561. The reversal of 1018220544 is 4450228101.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 32845809 + ... + 32845839.

Almost surely, 2^1018220544 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 1018220544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718930496).

1018220544 is an abundant number, since it is smaller than the sum of its proper divisors (2419640448).

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

1018220544 is an frugal number, since it uses more digits than its factorization.

1018220544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1018220544 is about 31909.5682202063. The cubic root of 1018220544 is about 1006.0369960058.

Adding to 1018220544 its reverse (4450228101), we get a palindrome (5468448645).

The spelling of 1018220544 in words is "one billion, eighteen million, two hundred twenty thousand, five hundred forty-four".