1085869231290 has 48 divisors (see below), whose sum is σ = 2824069543776. Its totient is φ = 289482098400.

The previous prime is 1085869231253. The next prime is 1085869231319. The reversal of 1085869231290 is 921329685801.

1085869231290 is a `hidden beast` number, since 1 + 0 + 8 + 586 + 9 + 2 + 31 + 29 + 0 = 666.

It is a super-2 number, since 2×1085869231290² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1413856 + ... + 2042235.

It is an arithmetic number, because the mean of its divisors is an integer number (58834782162).

Almost surely, 2^{1085869231290} is an apocalyptic number.

1085869231290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1085869231290 is an abundant number, since it is smaller than the sum of its proper divisors (1738200312486).

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

1085869231290 is a wasteful number, since it uses less digits than its factorization.

1085869231290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459595 (or 3459592 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 1085869231290 in words is "one trillion, eighty-five billion, eight hundred sixty-nine million, two hundred thirty-one thousand, two hundred ninety".