1081630720 has 56 divisors (see below), whose sum is σ = 2595853584. Its totient is φ = 432635904.

The previous prime is 1081630709. The next prime is 1081630721. The reversal of 1081630720 is 270361801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081630721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27757 + ... + 54163.

Almost surely, 2^1081630720 is an apocalyptic number.

1081630720 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 1081630720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297926792).

1081630720 is an abundant number, since it is smaller than the sum of its proper divisors (1514222864).

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

1081630720 is an frugal number, since it uses more digits than its factorization.

1081630720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26438 (or 26414 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1081630720 is about 32888.1547065201. The cubic root of 1081630720 is about 1026.5016957245.

The spelling of 1081630720 in words is "one billion, eighty-one million, six hundred thirty thousand, seven hundred twenty".