1380784 has 20 divisors (see below), whose sum is σ = 2694520. Its totient is φ = 685440.

The previous prime is 1380781. The next prime is 1380793. The reversal of 1380784 is 4870831.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 3172 + ... + 3580.

It is an arithmetic number, because the mean of its divisors is an integer number (134726).

2^1380784 is an apocalyptic number.

It is an amenable number.

1380784 is a deficient number, since it is larger than the sum of its proper divisors (1313736).

1380784 is a wasteful number, since it uses less digits than its factorization.

1380784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1380784 is about 1175.0676576266. The cubic root of 1380784 is about 111.3547076304.

The spelling of 1380784 in words is "one million, three hundred eighty thousand, seven hundred eighty-four".