1085808636 has 36 divisors (see below), whose sum is σ = 2994200664. Its totient is φ = 329032800.

The previous prime is 1085808629. The next prime is 1085808641. The reversal of 1085808636 is 6368085801.

1085808636 is a `hidden beast` number, since 1 + 0 + 8 + 5 + 8 + 0 + 8 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 1085808591 and 1085808600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370575 + ... + 1371366.

Almost surely, 2^1085808636 is an apocalyptic number.

It is an amenable number.

1085808636 is an abundant number, since it is smaller than the sum of its proper divisors (1908392028).

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

1085808636 is a wasteful number, since it uses less digits than its factorization.

1085808636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741962 (or 2741957 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1085808636 is about 32951.6105220974. The cubic root of 1085808636 is about 1027.8216557385.

The spelling of 1085808636 in words is "one billion, eighty-five million, eight hundred eight thousand, six hundred thirty-six".