1380780 has 48 divisors (see below), whose sum is σ = 4297440. Its totient is φ = 368064.

The previous prime is 1380779. The next prime is 1380781. The reversal of 1380780 is 870831.

It is an interprime number because it is at equal distance from previous prime (1380779) and next prime (1380781).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1380781) 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, 739 + ... + 1818.

It is an arithmetic number, because the mean of its divisors is an integer number (89530).

2^1380780 is an apocalyptic number.

1380780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1380780 is an abundant number, since it is smaller than the sum of its proper divisors (2916660).

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

1380780 is a wasteful number, since it uses less digits than its factorization.

1380780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575 (or 2567 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1380780 is about 1175.0659555957. The cubic root of 1380780 is about 111.3546001023.

The spelling of 1380780 in words is "one million, three hundred eighty thousand, seven hundred eighty".