1378408 has 16 divisors (see below), whose sum is σ = 2645280. Its totient is φ = 673008.

The previous prime is 1378397. The next prime is 1378427. The reversal of 1378408 is 8048731.

It is a happy number.

It is a super-2 number, since 2×1378408² = 3800017228928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1378408.

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 3 ways as a sum of consecutive naturals, for example, 1660 + ... + 2347.

It is an arithmetic number, because the mean of its divisors is an integer number (165330).

2^1378408 is an apocalyptic number.

It is an amenable number.

1378408 is a deficient number, since it is larger than the sum of its proper divisors (1266872).

1378408 is a wasteful number, since it uses less digits than its factorization.

1378408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056 (or 4052 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1378408 is about 1174.0562167120. The cubic root of 1378408 is about 111.2907993267.

The spelling of 1378408 in words is "one million, three hundred seventy-eight thousand, four hundred eight".