1131604356 has 48 divisors (see below), whose sum is σ = 2786535360. Its totient is φ = 356428800.

The previous prime is 1131604333. The next prime is 1131604363. The reversal of 1131604356 is 6534061311.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85240 + ... + 97616.

It is an arithmetic number, because the mean of its divisors is an integer number (58052820).

Almost surely, 2^1131604356 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 1131604356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393267680).

1131604356 is an abundant number, since it is smaller than the sum of its proper divisors (1654931004).

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

1131604356 is a wasteful number, since it uses less digits than its factorization.

1131604356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12804 (or 12802 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1131604356 is about 33639.3275200323. The cubic root of 1131604356 is about 1042.0731439722.

Adding to 1131604356 its reverse (6534061311), we get a palindrome (7665665667).

The spelling of 1131604356 in words is "one billion, one hundred thirty-one million, six hundred four thousand, three hundred fifty-six".