1378304 has 24 divisors (see below), whose sum is σ = 2760030. Its totient is φ = 688128.

The previous prime is 1378301. The next prime is 1378319. The reversal of 1378304 is 4038731.

It can be written as a sum of positive squares in only one way, i.e., 1254400 + 123904 = 1120^2 + 352^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1712 + ... + 2384.

2^1378304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1380015).

1378304 is an abundant number, since it is smaller than the sum of its proper divisors (1381726).

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

1378304 is an frugal number, since it uses more digits than its factorization.

1378304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1378304 is about 1174.0119249820. The cubic root of 1378304 is about 111.2880003165.

The spelling of 1378304 in words is "one million, three hundred seventy-eight thousand, three hundred four".