1080387840 has 144 divisors (see below), whose sum is σ = 3943513728. Its totient is φ = 246939648.

The previous prime is 1080387829. The next prime is 1080387877. The reversal of 1080387840 is 487830801.

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, 6784 + ... + 46976.

It is an arithmetic number, because the mean of its divisors is an integer number (27385512).

Almost surely, 2^1080387840 is an apocalyptic number.

1080387840 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 1080387840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971756864).

1080387840 is an abundant number, since it is smaller than the sum of its proper divisors (2863125888).

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

1080387840 is an equidigital number, since it uses as much as digits as its factorization.

1080387840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40224 (or 40210 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 1080387840 is about 32869.2537183308. The cubic root of 1080387840 is about 1026.1083675801.

The spelling of 1080387840 in words is "one billion, eighty million, three hundred eighty-seven thousand, eight hundred forty".