1118844540 has 144 divisors (see below), whose sum is σ = 3712232160. Its totient is φ = 270512640.

The previous prime is 1118844539. The next prime is 1118844589. The reversal of 1118844540 is 454488111.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1118844495 and 1118844504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1403422 + ... + 1404218.

It is an arithmetic number, because the mean of its divisors is an integer number (25779390).

Almost surely, 2^1118844540 is an apocalyptic number.

1118844540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1118844540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1856116080).

1118844540 is an abundant number, since it is smaller than the sum of its proper divisors (2593387620).

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

1118844540 is a wasteful number, since it uses less digits than its factorization.

1118844540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 1118844540 is about 33449.1336210671. The cubic root of 1118844540 is about 1038.1415713438.

The spelling of 1118844540 in words is "one billion, one hundred eighteen million, eight hundred forty-four thousand, five hundred forty".