1081989936 has 30 divisors (see below), whose sum is σ = 3028069460. Its totient is φ = 360663264.

The previous prime is 1081989919. The next prime is 1081989947. The reversal of 1081989936 is 6399891801.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3756766 + ... + 3757053.

Almost surely, 2^1081989936 is an apocalyptic number.

1081989936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1081989936 is an abundant number, since it is smaller than the sum of its proper divisors (1946079524).

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

1081989936 is a wasteful number, since it uses less digits than its factorization.

1081989936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7513833 (or 7513824 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 1081989936 is about 32893.6154291376. The cubic root of 1081989936 is about 1026.6153189214.

The spelling of 1081989936 in words is "one billion, eighty-one million, nine hundred eighty-nine thousand, nine hundred thirty-six".