1091263104 has 80 divisors (see below), whose sum is σ = 3247612170. Its totient is φ = 363750912.

The previous prime is 1091263051. The next prime is 1091263111. The reversal of 1091263104 is 4013621901.

1091263104 is a `hidden beast` number, since 10 + 9 + 12 + 631 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1073217600 + 18045504 = 32760^2 + 4248^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42259 + ... + 62994.

Almost surely, 2^1091263104 is an apocalyptic number.

It is an amenable number.

1091263104 is an abundant number, since it is smaller than the sum of its proper divisors (2156349066).

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

1091263104 is an equidigital number, since it uses as much as digits as its factorization.

1091263104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105279 (or 105258 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1091263104 is about 33034.2716583853. The cubic root of 1091263104 is about 1029.5398403241.

The spelling of 1091263104 in words is "one billion, ninety-one million, two hundred sixty-three thousand, one hundred four".