1378456 has 8 divisors (see below), whose sum is σ = 2584620. Its totient is φ = 689224.

The previous prime is 1378441. The next prime is 1378499. The reversal of 1378456 is 6548731.

It is a tau number, because it is divible by the number of its divisors (8).

It is a d-powerful number, because it can be written as 1 + 3⁵ + 7⁵ + 8⁵ + 4¹⁰ + 5³ + 6⁷ .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 86146 + ... + 86161.

2^1378456 is an apocalyptic number.

It is an amenable number.

1378456 is a deficient number, since it is larger than the sum of its proper divisors (1206164).

1378456 is a wasteful number, since it uses less digits than its factorization.

1378456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172313 (or 172309 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 1378456 is about 1174.0766584853. The cubic root of 1378456 is about 111.2920911301.

The spelling of 1378456 in words is "one million, three hundred seventy-eight thousand, four hundred fifty-six".