1091253800 has 192 divisors, whose sum is σ = 3307288320. Its totient is φ = 324956160.

The previous prime is 1091253773. The next prime is 1091253803. The reversal of 1091253800 is 83521901.

It is not an unprimeable number, because it can be changed into a prime (1091253803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 307637 + ... + 311163.

It is an arithmetic number, because the mean of its divisors is an integer number (17225460).

Almost surely, 2^1091253800 is an apocalyptic number.

1091253800 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 1091253800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653644160).

1091253800 is an abundant number, since it is smaller than the sum of its proper divisors (2216034520).

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

1091253800 is a wasteful number, since it uses less digits than its factorization.

1091253800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580 (or 3571 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1091253800 is about 33034.1308346383. The cubic root of 1091253800 is about 1029.5369143979.

The spelling of 1091253800 in words is "one billion, ninety-one million, two hundred fifty-three thousand, eight hundred".