1089136998 has 12 divisors (see below), whose sum is σ = 2359796868. Its totient is φ = 363045660.

The previous prime is 1089136973. The next prime is 1089137017. The reversal of 1089136998 is 8996319801.

1089136998 is a `hidden beast` number, since 108 + 91 + 369 + 98 = 666.

It is a Curzon number.

It is a congruent number.

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, 30253788 + ... + 30253823.

It is an arithmetic number, because the mean of its divisors is an integer number (196649739).

Almost surely, 2^1089136998 is an apocalyptic number.

1089136998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1089136998 is an abundant number, since it is smaller than the sum of its proper divisors (1270659870).

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

1089136998 is a wasteful number, since it uses less digits than its factorization.

1089136998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60507619 (or 60507616 counting only the distinct ones).

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

The square root of 1089136998 is about 33002.0756619944. The cubic root of 1089136998 is about 1028.8707887407.

The spelling of 1089136998 in words is "one billion, eighty-nine million, one hundred thirty-six thousand, nine hundred ninety-eight".