1082861440 has 64 divisors (see below), whose sum is σ = 2615553360. Its totient is φ = 428654592.

The previous prime is 1082861431. The next prime is 1082861443. The reversal of 1082861440 is 441682801.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1082861396 and 1082861405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1082861443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53359 + ... + 70801.

Almost surely, 2^1082861440 is an apocalyptic number.

1082861440 is a gapful number since it is divisible by the number (10) 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 1082861440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1307776680).

1082861440 is an abundant number, since it is smaller than the sum of its proper divisors (1532691920).

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

1082861440 is an equidigital number, since it uses as much as digits as its factorization.

1082861440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17559 (or 17547 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 1082861440 is about 32906.8600750664. The cubic root of 1082861440 is about 1026.8908788623.

The spelling of 1082861440 in words is "one billion, eighty-two million, eight hundred sixty-one thousand, four hundred forty".