1091726240 has 96 divisors (see below), whose sum is σ = 2822916096. Its totient is φ = 395688960.

The previous prime is 1091726227. The next prime is 1091726267. The reversal of 1091726240 is 426271901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1091726197 and 1091726206.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 655649 + ... + 657311.

It is an arithmetic number, because the mean of its divisors is an integer number (29405376).

Almost surely, 2^1091726240 is an apocalyptic number.

1091726240 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 1091726240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411458048).

1091726240 is an abundant number, since it is smaller than the sum of its proper divisors (1731189856).

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

1091726240 is a wasteful number, since it uses less digits than its factorization.

1091726240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1091726240 is about 33041.2808468437. The cubic root of 1091726240 is about 1029.6854665326.

The spelling of 1091726240 in words is "one billion, ninety-one million, seven hundred twenty-six thousand, two hundred forty".