1089888905 has 32 divisors (see below), whose sum is σ = 1525058304. Its totient is φ = 732312576.

The previous prime is 1089888901. The next prime is 1089888913. The reversal of 1089888905 is 5098889801.

It is a cyclic number.

It is not a de Polignac number, because 1089888905 - 2² = 1089888901 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 415157 + ... + 417773.

It is an arithmetic number, because the mean of its divisors is an integer number (47658072).

Almost surely, 2^1089888905 is an apocalyptic number.

It is an amenable number.

1089888905 is a deficient number, since it is larger than the sum of its proper divisors (435169399).

1089888905 is a wasteful number, since it uses less digits than its factorization.

1089888905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865.

The product of its (nonzero) digits is 1658880, while the sum is 56.

The square root of 1089888905 is about 33013.4655103035. The cubic root of 1089888905 is about 1029.1075012911.

The spelling of 1089888905 in words is "one billion, eighty-nine million, eight hundred eighty-eight thousand, nine hundred five".