1089765198 has 32 divisors (see below), whose sum is σ = 2424834720. Its totient is φ = 362784960.

The previous prime is 1089765169. The next prime is 1089765239. The reversal of 1089765198 is 8915679801.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30378 + ... + 55698.

It is an arithmetic number, because the mean of its divisors is an integer number (75776085).

Almost surely, 2^1089765198 is an apocalyptic number.

1089765198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1089765198 is an abundant number, since it is smaller than the sum of its proper divisors (1335069522).

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

1089765198 is a wasteful number, since it uses less digits than its factorization.

1089765198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26129 (or 26123 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The square root of 1089765198 is about 33011.5918731587. The cubic root of 1089765198 is about 1029.0685638000.

The spelling of 1089765198 in words is "one billion, eighty-nine million, seven hundred sixty-five thousand, one hundred ninety-eight".