1081918404 has 96 divisors (see below), whose sum is σ = 3211577600. Its totient is φ = 308551680.

The previous prime is 1081918393. The next prime is 1081918417. The reversal of 1081918404 is 4048191801.

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

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 31 ways as a sum of consecutive naturals, for example, 580434 + ... + 582294.

Almost surely, 2^1081918404 is an apocalyptic number.

1081918404 is a gapful number since it is divisible by the number (14) 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 1081918404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605788800).

1081918404 is an abundant number, since it is smaller than the sum of its proper divisors (2129659196).

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

1081918404 is a wasteful number, since it uses less digits than its factorization.

1081918404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1081918404 is about 32892.5280876980. The cubic root of 1081918404 is about 1026.5926947229.

The spelling of 1081918404 in words is "one billion, eighty-one million, nine hundred eighteen thousand, four hundred four".