1085389236 has 72 divisors (see below), whose sum is σ = 2892524544. Its totient is φ = 342659520.

The previous prime is 1085389223. The next prime is 1085389237. The reversal of 1085389236 is 6329835801.

It is a happy number.

1085389236 is a `hidden beast` number, since 108 + 538 + 9 + 2 + 3 + 6 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1085389191 and 1085389200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085389237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42106 + ... + 62798.

It is an arithmetic number, because the mean of its divisors is an integer number (40173952).

Almost surely, 2^1085389236 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 1085389236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446262272).

1085389236 is an abundant number, since it is smaller than the sum of its proper divisors (1807135308).

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

1085389236 is a wasteful number, since it uses less digits than its factorization.

1085389236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20781 (or 20776 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1085389236 is about 32945.2460303456. The cubic root of 1085389236 is about 1027.6893046345.

The spelling of 1085389236 in words is "one billion, eighty-five million, three hundred eighty-nine thousand, two hundred thirty-six".