1091423232 has 264 divisors, whose sum is σ = 3474332160. Its totient is φ = 328458240.

The previous prime is 1091423197. The next prime is 1091423243. The reversal of 1091423232 is 2323241901.

It is a happy number.

1091423232 is a `hidden beast` number, since 1 + 0 + 9 + 1 + 423 + 232 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1091423196 and 1091423205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4027257 + ... + 4027527.

Almost surely, 2^1091423232 is an apocalyptic number.

1091423232 is a gapful number since it is divisible by the number (12) 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 1091423232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737166080).

1091423232 is an abundant number, since it is smaller than the sum of its proper divisors (2382908928).

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

1091423232 is a wasteful number, since it uses less digits than its factorization.

1091423232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1091423232 is about 33036.6952342392. The cubic root of 1091423232 is about 1029.5901948451.

The spelling of 1091423232 in words is "one billion, ninety-one million, four hundred twenty-three thousand, two hundred thirty-two".