1378404 has 24 divisors (see below), whose sum is σ = 3573920. Its totient is φ = 459432.

The previous prime is 1378397. The next prime is 1378427. The reversal of 1378404 is 4048731.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6274 + ... + 6489.

2^1378404 is an apocalyptic number.

It is an amenable number.

1378404 is an abundant number, since it is smaller than the sum of its proper divisors (2195516).

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

1378404 is a wasteful number, since it uses less digits than its factorization.

1378404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776 (or 12768 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1378404 is about 1174.0545132148. The cubic root of 1378404 is about 111.2906916751.

The spelling of 1378404 in words is "one million, three hundred seventy-eight thousand, four hundred four".