1396978 has 8 divisors (see below), whose sum is σ = 2286000. Its totient is φ = 634980.

The previous prime is 1396963. The next prime is 1396979. The reversal of 1396978 is 8796931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1396979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31728 + ... + 31771.

It is an arithmetic number, because the mean of its divisors is an integer number (285750).

2^1396978 is an apocalyptic number.

1396978 is a deficient number, since it is larger than the sum of its proper divisors (889022).

1396978 is a wasteful number, since it uses less digits than its factorization.

1396978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63512.

The product of its digits is 81648, while the sum is 43.

The square root of 1396978 is about 1181.9382386572. The cubic root of 1396978 is about 111.7883438895.

It can be divided in two parts, 139 and 6978, that added together give a palindrome (7117).

The spelling of 1396978 in words is "one million, three hundred ninety-six thousand, nine hundred seventy-eight".