1386478 has 8 divisors (see below), whose sum is σ = 2092968. Its totient is φ = 688824.

The previous prime is 1386457. The next prime is 1386479. The reversal of 1386478 is 8746831.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801 + ... + 2452.

It is an arithmetic number, because the mean of its divisors is an integer number (261621).

2^1386478 is an apocalyptic number.

1386478 is a deficient number, since it is larger than the sum of its proper divisors (706490).

1386478 is a wasteful number, since it uses less digits than its factorization.

1386478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418.

The product of its digits is 32256, while the sum is 37.

The square root of 1386478 is about 1177.4880041852. The cubic root of 1386478 is about 111.5075638189.

The spelling of 1386478 in words is "one million, three hundred eighty-six thousand, four hundred seventy-eight".