1081918402 has 8 divisors (see below), whose sum is σ = 1625168700. Its totient is φ = 540195504.

The previous prime is 1081918393. The next prime is 1081918417. The reversal of 1081918402 is 2048191801.

It can be written as a sum of positive squares in 2 ways, for example, as 849081321 + 232837081 = 29139^2 + 15259^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 380077 + ... + 382912.

Almost surely, 2^1081918402 is an apocalyptic number.

1081918402 is a deficient number, since it is larger than the sum of its proper divisors (543250298).

1081918402 is an equidigital number, since it uses as much as digits as its factorization.

1081918402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763700.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1081918402 is about 32892.5280572959. The cubic root of 1081918402 is about 1026.5926940903.

The spelling of 1081918402 in words is "one billion, eighty-one million, nine hundred eighteen thousand, four hundred two".