1085865396 has 192 divisors, whose sum is σ = 3294756864. Its totient is φ = 270115200.

The previous prime is 1085865383. The next prime is 1085865401. The reversal of 1085865396 is 6935685801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4783435 + ... + 4783661.

It is an arithmetic number, because the mean of its divisors is an integer number (17160192).

Almost surely, 2^1085865396 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 1085865396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1647378432).

1085865396 is an abundant number, since it is smaller than the sum of its proper divisors (2208891468).

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

1085865396 is a wasteful number, since it uses less digits than its factorization.

1085865396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 1085865396 is about 32952.4717737532. The cubic root of 1085865396 is about 1027.8395650148.

The spelling of 1085865396 in words is "one billion, eighty-five million, eight hundred sixty-five thousand, three hundred ninety-six".