1085215188 has 12 divisors (see below), whose sum is σ = 2532168800. Its totient is φ = 361738392.

The previous prime is 1085215129. The next prime is 1085215189. The reversal of 1085215188 is 8815125801.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085215189) 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 3 ways as a sum of consecutive naturals, for example, 45217288 + ... + 45217311.

Almost surely, 2^1085215188 is an apocalyptic number.

It is an amenable number.

1085215188 is an abundant number, since it is smaller than the sum of its proper divisors (1446953612).

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

1085215188 is a wasteful number, since it uses less digits than its factorization.

1085215188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90434606 (or 90434604 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 39.

The square root of 1085215188 is about 32942.6044507716. The cubic root of 1085215188 is about 1027.6343698628.

The spelling of 1085215188 in words is "one billion, eighty-five million, two hundred fifteen thousand, one hundred eighty-eight".