1378688 has 16 divisors (see below), whose sum is σ = 2746860. Its totient is φ = 689280.

The previous prime is 1378681. The next prime is 1378691. The reversal of 1378688 is 8868731.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258 + ... + 5513.

2^1378688 is an apocalyptic number.

It is an amenable number.

1378688 is a deficient number, since it is larger than the sum of its proper divisors (1368172).

1378688 is an equidigital number, since it uses as much as digits as its factorization.

1378688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10785 (or 10773 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 1378688 is about 1174.1754553728. The cubic root of 1378688 is about 111.2983344238.

The spelling of 1378688 in words is "one million, three hundred seventy-eight thousand, six hundred eighty-eight".