1081918406 has 32 divisors (see below), whose sum is σ = 1772772960. Its totient is φ = 493433856.

The previous prime is 1081918393. The next prime is 1081918417. The reversal of 1081918406 is 6048191801.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1081918406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132416 + ... + 140348.

It is an arithmetic number, because the mean of its divisors is an integer number (55399155).

Almost surely, 2^1081918406 is an apocalyptic number.

1081918406 is a deficient number, since it is larger than the sum of its proper divisors (690854554).

1081918406 is a wasteful number, since it uses less digits than its factorization.

1081918406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 1081918406 is about 32892.5281181000. The cubic root of 1081918406 is about 1026.5926953555.

The spelling of 1081918406 in words is "one billion, eighty-one million, nine hundred eighteen thousand, four hundred six".