1085223636 has 144 divisors (see below), whose sum is σ = 3277411200. Its totient is φ = 304166016.

The previous prime is 1085223631. The next prime is 1085223641. The reversal of 1085223636 is 6363225801.

It is a happy number.

1085223636 is a `hidden beast` number, since 10 + 8 + 5 + 2 + 2 + 3 + 636 = 666.

It is an interprime number because it is at equal distance from previous prime (1085223631) and next prime (1085223641).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1085223636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085223631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8545005 + ... + 8545131.

It is an arithmetic number, because the mean of its divisors is an integer number (22759800).

Almost surely, 2^1085223636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1085223636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1638705600).

1085223636 is an abundant number, since it is smaller than the sum of its proper divisors (2192187564).

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

1085223636 is a wasteful number, since it uses less digits than its factorization.

1085223636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1085223636 is about 32942.7326735351. The cubic root of 1085223636 is about 1027.6370364407.

The spelling of 1085223636 in words is "one billion, eighty-five million, two hundred twenty-three thousand, six hundred thirty-six".