1378906 has 16 divisors (see below), whose sum is σ = 2201760. Its totient is φ = 645840.

The previous prime is 1378903. The next prime is 1378907. The reversal of 1378906 is 6098731.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (1378903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4840 + ... + 5116.

It is an arithmetic number, because the mean of its divisors is an integer number (137610).

2^1378906 is an apocalyptic number.

1378906 is a deficient number, since it is larger than the sum of its proper divisors (822854).

1378906 is a wasteful number, since it uses less digits than its factorization.

1378906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1378906 is about 1174.2682828042. The cubic root of 1378906 is about 111.3042003287.

The spelling of 1378906 in words is "one million, three hundred seventy-eight thousand, nine hundred six".