1388734 has 4 divisors (see below), whose sum is σ = 2083104. Its totient is φ = 694366.

The previous prime is 1388719. The next prime is 1388743. The reversal of 1388734 is 4378831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4378831 = 83 ⋅52757.

It is a self number, because there is not a number n which added to its sum of digits gives 1388734.

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 as a sum of consecutive naturals, namely, 347182 + ... + 347185.

It is an arithmetic number, because the mean of its divisors is an integer number (520776).

2^1388734 is an apocalyptic number.

1388734 is a deficient number, since it is larger than the sum of its proper divisors (694370).

1388734 is an equidigital number, since it uses as much as digits as its factorization.

1388734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694369.

The product of its digits is 16128, while the sum is 34.

The square root of 1388734 is about 1178.4455863552. The cubic root of 1388734 is about 111.5680106838.

The spelling of 1388734 in words is "one million, three hundred eighty-eight thousand, seven hundred thirty-four".