1131831456 has 96 divisors (see below), whose sum is σ = 3453166080. Its totient is φ = 317888256.

The previous prime is 1131831431. The next prime is 1131831461. The reversal of 1131831456 is 6541381311.

It is a tau number, because it is divible by the number of its divisors (96).

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, 25375 + ... + 53921.

It is an arithmetic number, because the mean of its divisors is an integer number (35970480).

Almost surely, 2^1131831456 is an apocalyptic number.

1131831456 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 1131831456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726583040).

1131831456 is an abundant number, since it is smaller than the sum of its proper divisors (2321334624).

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

1131831456 is a wasteful number, since it uses less digits than its factorization.

1131831456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28626 (or 28618 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 1131831456 is about 33642.7028640685. The cubic root of 1131831456 is about 1042.1428500139.

The spelling of 1131831456 in words is "one billion, one hundred thirty-one million, eight hundred thirty-one thousand, four hundred fifty-six".