1388605 has 8 divisors (see below), whose sum is σ = 1677312. Its totient is φ = 1103568.

The previous prime is 1388603. The next prime is 1388623. The reversal of 1388605 is 5068831.

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

It is a cyclic number.

It is not a de Polignac number, because 1388605 - 2¹ = 1388603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (209664).

2^1388605 is an apocalyptic number.

It is an amenable number.

1388605 is a deficient number, since it is larger than the sum of its proper divisors (288707).

1388605 is a wasteful number, since it uses less digits than its factorization.

1388605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1388605 is about 1178.3908519672. The cubic root of 1388605 is about 111.5645560460.

The spelling of 1388605 in words is "one million, three hundred eighty-eight thousand, six hundred five".