1091044680 has 64 divisors (see below), whose sum is σ = 3570696000. Its totient is φ = 264495360.

The previous prime is 1091044679. The next prime is 1091044781. The reversal of 1091044680 is 864401901.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411955 + ... + 414594.

It is an arithmetic number, because the mean of its divisors is an integer number (55792125).

Almost surely, 2^1091044680 is an apocalyptic number.

1091044680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091044680 is an abundant number, since it is smaller than the sum of its proper divisors (2479651320).

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

1091044680 is a wasteful number, since it uses less digits than its factorization.

1091044680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826574 (or 826570 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1091044680 is about 33030.9654718114. The cubic root of 1091044680 is about 1029.4711458560.

The spelling of 1091044680 in words is "one billion, ninety-one million, forty-four thousand, six hundred eighty".