1131815936 has 88 divisors (see below), whose sum is σ = 2428888320. Its totient is φ = 525238272.

The previous prime is 1131815911. The next prime is 1131815941. The reversal of 1131815936 is 6395181311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131815936.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374821 + ... + 1375643.

Almost surely, 2^1131815936 is an apocalyptic number.

1131815936 is a gapful number since it is divisible by the number (16) 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 1131815936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214444160).

1131815936 is an abundant number, since it is smaller than the sum of its proper divisors (1297072384).

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

1131815936 is an equidigital number, since it uses as much as digits as its factorization.

1131815936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 921 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 1131815936 is about 33642.4722040459. The cubic root of 1131815936 is about 1042.1380866042.

The spelling of 1131815936 in words is "one billion, one hundred thirty-one million, eight hundred fifteen thousand, nine hundred thirty-six".