1388679 has 16 divisors (see below), whose sum is σ = 1992672. Its totient is φ = 857088.

The previous prime is 1388669. The next prime is 1388687. The reversal of 1388679 is 9768831.

It is not a de Polignac number, because 1388679 - 2¹¹ = 1386631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1388679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3537 + ... + 3909.

It is an arithmetic number, because the mean of its divisors is an integer number (124542).

2^1388679 is an apocalyptic number.

1388679 is a deficient number, since it is larger than the sum of its proper divisors (603993).

1388679 is a wasteful number, since it uses less digits than its factorization.

1388679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466.

The product of its digits is 72576, while the sum is 42.

The square root of 1388679 is about 1178.4222502991. The cubic root of 1388679 is about 111.5665378024.

The spelling of 1388679 in words is "one million, three hundred eighty-eight thousand, six hundred seventy-nine".