1131837984 has 108 divisors (see below), whose sum is σ = 3334193226. Its totient is φ = 364191744.

The previous prime is 1131837983. The next prime is 1131837997. The reversal of 1131837984 is 4897381311.

It can be written as a sum of positive squares in 3 ways, for example, as 1124931600 + 6906384 = 33540^2 + 2628^2 .

It is not an unprimeable number, because it can be changed into a prime (1131837983) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 239872 + ... + 244544.

Almost surely, 2^1131837984 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 1131837984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667096613).

1131837984 is an abundant number, since it is smaller than the sum of its proper divisors (2202355242).

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

1131837984 is a wasteful number, since it uses less digits than its factorization.

1131837984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747 (or 4707 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1131837984 is about 33642.7998834818. The cubic root of 1131837984 is about 1042.1448535794.

The spelling of 1131837984 in words is "one billion, one hundred thirty-one million, eight hundred thirty-seven thousand, nine hundred eighty-four".