1085172198 has 32 divisors (see below), whose sum is σ = 2370131712. Its totient is φ = 328495200.

The previous prime is 1085172197. The next prime is 1085172217. The reversal of 1085172198 is 8912715801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085172197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58743 + ... + 74973.

It is an arithmetic number, because the mean of its divisors is an integer number (74066616).

Almost surely, 2^1085172198 is an apocalyptic number.

1085172198 is an abundant number, since it is smaller than the sum of its proper divisors (1284959514).

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

1085172198 is a wasteful number, since it uses less digits than its factorization.

1085172198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17260.

The product of its (nonzero) digits is 40320, while the sum is 42.

The square root of 1085172198 is about 32941.9519458092. The cubic root of 1085172198 is about 1027.6208000241.

Adding to 1085172198 its reverse (8912715801), we get a palindrome (9997887999).

The spelling of 1085172198 in words is "one billion, eighty-five million, one hundred seventy-two thousand, one hundred ninety-eight".