1091144992 has 24 divisors (see below), whose sum is σ = 2455076736. Its totient is φ = 467633472.

The previous prime is 1091144987. The next prime is 1091145007. The reversal of 1091144992 is 2994411901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2435368 + ... + 2435815.

It is an arithmetic number, because the mean of its divisors is an integer number (102294864).

Almost surely, 2^1091144992 is an apocalyptic number.

It is an amenable number.

1091144992 is an abundant number, since it is smaller than the sum of its proper divisors (1363931744).

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

1091144992 is an equidigital number, since it uses as much as digits as its factorization.

1091144992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871200 (or 4871192 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1091144992 is about 33032.4838908611. The cubic root of 1091144992 is about 1029.5026951735.

The spelling of 1091144992 in words is "one billion, ninety-one million, one hundred forty-four thousand, nine hundred ninety-two".