1081908 has 36 divisors (see below), whose sum is σ = 2805348. Its totient is φ = 351360.

The previous prime is 1081907. The next prime is 1081919. The reversal of 1081908 is 8091801.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 501264 = 762^2 + 708^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1110 + ... + 1842.

2^1081908 is an apocalyptic number.

1081908 is a gapful number since it is divisible by the number (18) 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 1081908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402674).

1081908 is an abundant number, since it is smaller than the sum of its proper divisors (1723440).

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

1081908 is a wasteful number, since it uses less digits than its factorization.

1081908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1081908 is about 1040.1480663829. The cubic root of 1081908 is about 102.6589404054.

It can be divided in two parts, 108 and 1908, that added together give a triangular number (2016 = T₆₃).

The spelling of 1081908 in words is "one million, eighty-one thousand, nine hundred eight".