1085371812 has 120 divisors (see below), whose sum is σ = 3253943616. Its totient is φ = 309033792.

The previous prime is 1085371787. The next prime is 1085371813. The reversal of 1085371812 is 2181735801.

1085371812 is a `hidden beast` number, since 108 + 537 + 1 + 8 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1085371813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 845323 + ... + 846605.

Almost surely, 2^1085371812 is an apocalyptic number.

1085371812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1085371812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626971808).

1085371812 is an abundant number, since it is smaller than the sum of its proper divisors (2168571804).

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

1085371812 is a wasteful number, since it uses less digits than its factorization.

1085371812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 1085371812 is about 32944.9815905245. The cubic root of 1085371812 is about 1027.6838053617.

The spelling of 1085371812 in words is "one billion, eighty-five million, three hundred seventy-one thousand, eight hundred twelve".