1388766 has 8 divisors (see below), whose sum is σ = 2777544. Its totient is φ = 462920.

The previous prime is 1388743. The next prime is 1388773. The reversal of 1388766 is 6678831.

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

1388766 is an admirable number.

It is an Ulam number.

It is a congruent number.

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, 115725 + ... + 115736.

It is an arithmetic number, because the mean of its divisors is an integer number (347193).

2^1388766 is an apocalyptic number.

1388766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388766 is a wasteful number, since it uses less digits than its factorization.

1388766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231466.

The product of its digits is 48384, while the sum is 39.

The square root of 1388766 is about 1178.4591634843. The cubic root of 1388766 is about 111.5688676151.

The spelling of 1388766 in words is "one million, three hundred eighty-eight thousand, seven hundred sixty-six".