1091883408 has 320 divisors, whose sum is σ = 3719761920. Its totient is φ = 267724800.

The previous prime is 1091883407. The next prime is 1091883409. The reversal of 1091883408 is 8043881901.

It is an interprime number because it is at equal distance from previous prime (1091883407) and next prime (1091883409).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1091883408.

It is not an unprimeable number, because it can be changed into a prime (1091883407) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6538141 + ... + 6538307.

It is an arithmetic number, because the mean of its divisors is an integer number (11624256).

Almost surely, 2^1091883408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091883408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1859880960).

1091883408 is an abundant number, since it is smaller than the sum of its proper divisors (2627878512).

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

1091883408 is a wasteful number, since it uses less digits than its factorization.

1091883408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1091883408 is about 33043.6591194135. The cubic root of 1091883408 is about 1029.7348763065.

The spelling of 1091883408 in words is "one billion, ninety-one million, eight hundred eighty-three thousand, four hundred eight".