1089911872 has 56 divisors (see below), whose sum is σ = 2557028160. Its totient is φ = 450992640.

The previous prime is 1089911863. The next prime is 1089911899. The reversal of 1089911872 is 2781199801.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28954 + ... + 54937.

Almost surely, 2^1089911872 is an apocalyptic number.

It is an amenable number.

1089911872 is an abundant number, since it is smaller than the sum of its proper divisors (1467116288).

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

1089911872 is an equidigital number, since it uses as much as digits as its factorization.

1089911872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83939 (or 83929 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 46.

The square root of 1089911872 is about 33013.8133513837. The cubic root of 1089911872 is about 1029.1147299624.

The spelling of 1089911872 in words is "one billion, eighty-nine million, nine hundred eleven thousand, eight hundred seventy-two".