1378444 has 6 divisors (see below), whose sum is σ = 2412284. Its totient is φ = 689220.

The previous prime is 1378441. The next prime is 1378499. The reversal of 1378444 is 4448731.

It is a super-2 number, since 2×1378444² = 3800215722272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378441) 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 as a sum of consecutive naturals, namely, 172302 + ... + 172309.

2^1378444 is an apocalyptic number.

It is an amenable number.

1378444 is a deficient number, since it is larger than the sum of its proper divisors (1033840).

1378444 is a wasteful number, since it uses less digits than its factorization.

1378444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344615 (or 344613 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 1378444 is about 1174.0715480753. The cubic root of 1378444 is about 111.2917681821.

The spelling of 1378444 in words is "one million, three hundred seventy-eight thousand, four hundred forty-four".