1378704 has 20 divisors (see below), whose sum is σ = 3561776. Its totient is φ = 459552.

The previous prime is 1378703. The next prime is 1378721. The reversal of 1378704 is 4078731.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1378703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14314 + ... + 14409.

2^1378704 is an apocalyptic number.

It is an amenable number.

1378704 is an abundant number, since it is smaller than the sum of its proper divisors (2183072).

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

1378704 is a wasteful number, since it uses less digits than its factorization.

1378704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28734 (or 28728 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 1378704 is about 1174.1822686449. The cubic root of 1378704 is about 111.2987649699.

The spelling of 1378704 in words is "one million, three hundred seventy-eight thousand, seven hundred four".