1081814868 has 18 divisors (see below), whose sum is σ = 2734587674. Its totient is φ = 360604944.

The previous prime is 1081814849. The next prime is 1081814911. The reversal of 1081814868 is 8684181801.

1081814868 is a `hidden beast` number, since 10 + 81 + 81 + 486 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 749554884 + 332259984 = 27378^2 + 18228^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15025171 + ... + 15025242.

Almost surely, 2^1081814868 is an apocalyptic number.

1081814868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1081814868 is an abundant number, since it is smaller than the sum of its proper divisors (1652772806).

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

1081814868 is a wasteful number, since it uses less digits than its factorization.

1081814868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30050423 (or 30050418 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 45.

The square root of 1081814868 is about 32890.9541971649. The cubic root of 1081814868 is about 1026.5599465071.

The spelling of 1081814868 in words is "one billion, eighty-one million, eight hundred fourteen thousand, eight hundred sixty-eight".