1091009200 has 60 divisors (see below), whose sum is σ = 2625528880. Its totient is φ = 435674880.

The previous prime is 1091009191. The next prime is 1091009243. The reversal of 1091009200 is 29001901.

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 11 ways as a sum of consecutive naturals, for example, 281677 + ... + 285523.

Almost surely, 2^1091009200 is an apocalyptic number.

1091009200 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 1091009200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312764440).

1091009200 is an abundant number, since it is smaller than the sum of its proper divisors (1534519680).

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

1091009200 is a wasteful number, since it uses less digits than its factorization.

1091009200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574 (or 4563 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1091009200 is about 33030.4283956476. The cubic root of 1091009200 is about 1029.4599865110.

The spelling of 1091009200 in words is "one billion, ninety-one million, nine thousand, two hundred".