1135897812 has 108 divisors (see below), whose sum is σ = 3386218836. Its totient is φ = 320060160.

The previous prime is 1135897811. The next prime is 1135897837. The reversal of 1135897812 is 2187985311.

It can be written as a sum of positive squares in 2 ways, for example, as 682463376 + 453434436 = 26124^2 + 21294^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135897811) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 124362 + ... + 133182.

Almost surely, 2^1135897812 is an apocalyptic number.

1135897812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1135897812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693109418).

1135897812 is an abundant number, since it is smaller than the sum of its proper divisors (2250321024).

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

1135897812 is a wasteful number, since it uses less digits than its factorization.

1135897812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8918 (or 8906 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1135897812 is about 33703.0831230616. The cubic root of 1135897812 is about 1043.3894016171.

The spelling of 1135897812 in words is "one billion, one hundred thirty-five million, eight hundred ninety-seven thousand, eight hundred twelve".