1080391680 has 288 divisors, whose sum is σ = 3947907600. Its totient is φ = 272498688.

The previous prime is 1080391649. The next prime is 1080391703. The reversal of 1080391680 is 861930801.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1750732 + ... + 1751348.

Almost surely, 2^1080391680 is an apocalyptic number.

1080391680 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 1080391680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973953800).

1080391680 is an abundant number, since it is smaller than the sum of its proper divisors (2867515920).

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

1080391680 is a wasteful number, since it uses less digits than its factorization.

1080391680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1080391680 is about 32869.3121315308. The cubic root of 1080391680 is about 1026.1095832705.

The spelling of 1080391680 in words is "one billion, eighty million, three hundred ninety-one thousand, six hundred eighty".