1085159898 has 48 divisors (see below), whose sum is σ = 2431892736. Its totient is φ = 349349760.

The previous prime is 1085159893. The next prime is 1085159951. The reversal of 1085159898 is 8989515801.

It is not an unprimeable number, because it can be changed into a prime (1085159891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325890 + ... + 329202.

It is an arithmetic number, because the mean of its divisors is an integer number (50664432).

Almost surely, 2^1085159898 is an apocalyptic number.

1085159898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1085159898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215946368).

1085159898 is an abundant number, since it is smaller than the sum of its proper divisors (1346732838).

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

1085159898 is a wasteful number, since it uses less digits than its factorization.

1085159898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 54.

The square root of 1085159898 is about 32941.7652532465. The cubic root of 1085159898 is about 1027.6169174503.

The spelling of 1085159898 in words is "one billion, eighty-five million, one hundred fifty-nine thousand, eight hundred ninety-eight".