1089888906 has 32 divisors (see below), whose sum is σ = 2296028160. Its totient is φ = 343946736.

The previous prime is 1089888901. The next prime is 1089888913. The reversal of 1089888906 is 6098889801.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (1089888901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277005 + ... + 280911.

It is an arithmetic number, because the mean of its divisors is an integer number (71750880).

Almost surely, 2^1089888906 is an apocalyptic number.

1089888906 is an abundant number, since it is smaller than the sum of its proper divisors (1206139254).

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

1089888906 is a wasteful number, since it uses less digits than its factorization.

1089888906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6378.

The product of its (nonzero) digits is 1990656, while the sum is 57.

The square root of 1089888906 is about 33013.4655254489. The cubic root of 1089888906 is about 1029.1075016059.

The spelling of 1089888906 in words is "one billion, eighty-nine million, eight hundred eighty-eight thousand, nine hundred six".