1380655120 has 80 divisors (see below), whose sum is σ = 3469902912. Its totient is φ = 507870720.

The previous prime is 1380655099. The next prime is 1380655123. The reversal of 1380655120 is 215560831.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1380655123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291975 + ... + 296665.

Almost surely, 2^1380655120 is an apocalyptic number.

1380655120 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 1380655120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734951456).

1380655120 is an abundant number, since it is smaller than the sum of its proper divisors (2089247792).

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

1380655120 is a wasteful number, since it uses less digits than its factorization.

1380655120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000 (or 4994 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1380655120 is about 37157.1678145684. The cubic root of 1380655120 is about 1113.5124297042.

The spelling of 1380655120 in words is "one billion, three hundred eighty million, six hundred fifty-five thousand, one hundred twenty".