1380720 has 80 divisors (see below), whose sum is σ = 4678272. Its totient is φ = 334080.

The previous prime is 1380707. The next prime is 1380721. The reversal of 1380720 is 270831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380721) 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, 2379 + ... + 2901.

2^1380720 is an apocalyptic number.

1380720 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 1380720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339136).

1380720 is an abundant number, since it is smaller than the sum of its proper divisors (3297552).

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

1380720 is a wasteful number, since it uses less digits than its factorization.

1380720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1380720 is about 1175.0404248365. The cubic root of 1380720 is about 111.3529871558.

The spelling of 1380720 in words is "one million, three hundred eighty thousand, seven hundred twenty".