1388426 has 8 divisors (see below), whose sum is σ = 2242884. Its totient is φ = 640800.

The previous prime is 1388419. The next prime is 1388449. The reversal of 1388426 is 6248831.

It can be written as a sum of positive squares in 2 ways, for example, as 1207801 + 180625 = 1099^2 + 425^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1388392 and 1388401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26675 + ... + 26726.

2^1388426 is an apocalyptic number.

1388426 is a deficient number, since it is larger than the sum of its proper divisors (854458).

1388426 is a wasteful number, since it uses less digits than its factorization.

1388426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53416.

The product of its digits is 9216, while the sum is 32.

The square root of 1388426 is about 1178.3148984885. The cubic root of 1388426 is about 111.5597620468.

The spelling of 1388426 in words is "one million, three hundred eighty-eight thousand, four hundred twenty-six".