1091485000 has 80 divisors (see below), whose sum is σ = 2707992540. Its totient is φ = 410880000.

The previous prime is 1091484991. The next prime is 1091485013. The reversal of 1091485000 is 5841901.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 24940036 + 1066544964 = 4994^2 + 32658^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1091485000.

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 19 ways as a sum of consecutive naturals, for example, 78580 + ... + 91420.

Almost surely, 2^1091485000 is an apocalyptic number.

1091485000 is a gapful number since it is divisible by the number (10) 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 1091485000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353996270).

1091485000 is an abundant number, since it is smaller than the sum of its proper divisors (1616507540).

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

1091485000 is a wasteful number, since it uses less digits than its factorization.

1091485000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12884 (or 12865 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1091485000 is about 33037.6300602813. The cubic root of 1091485000 is about 1029.6096173525.

The spelling of 1091485000 in words is "one billion, ninety-one million, four hundred eighty-five thousand".