1388943 has 24 divisors (see below), whose sum is σ = 2130128. Its totient is φ = 870912.

The previous prime is 1388941. The next prime is 1388953. The reversal of 1388943 is 3498831.

It is not a de Polignac number, because 1388943 - 2¹ = 1388941 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388898 and 1388907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388941) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 14271 + ... + 14367.

2^1388943 is an apocalyptic number.

1388943 is a deficient number, since it is larger than the sum of its proper divisors (741185).

1388943 is a wasteful number, since it uses less digits than its factorization.

1388943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 180 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1388943 is about 1178.5342591541. The cubic root of 1388943 is about 111.5736072786.

The spelling of 1388943 in words is "one million, three hundred eighty-eight thousand, nine hundred forty-three".