1081196988 has 24 divisors (see below), whose sum is σ = 2581463808. Its totient is φ = 352017456.

The previous prime is 1081196981. The next prime is 1081196989. The reversal of 1081196988 is 8896911801.

It is a self number, because there is not a number n which added to its sum of digits gives 1081196988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081196981) 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 7 ways as a sum of consecutive naturals, for example, 1047156 + ... + 1048187.

It is an arithmetic number, because the mean of its divisors is an integer number (107560992).

Almost surely, 2^1081196988 is an apocalyptic number.

It is an amenable number.

1081196988 is an abundant number, since it is smaller than the sum of its proper divisors (1500266820).

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

1081196988 is a wasteful number, since it uses less digits than its factorization.

1081196988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095393 (or 2095391 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 51.

The square root of 1081196988 is about 32881.5599994891. The cubic root of 1081196988 is about 1026.3644689273.

The spelling of 1081196988 in words is "one billion, eighty-one million, one hundred ninety-six thousand, nine hundred eighty-eight".