1389756 has 24 divisors (see below), whose sum is σ = 3265920. Its totient is φ = 459952.

The previous prime is 1389749. The next prime is 1389769. The reversal of 1389756 is 6579831.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 1825 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2^1389756 is an apocalyptic number.

It is an amenable number.

1389756 is an abundant number, since it is smaller than the sum of its proper divisors (1876164).

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

1389756 is a wasteful number, since it uses less digits than its factorization.

1389756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 831 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 1389756 is about 1178.8791286642. The cubic root of 1389756 is about 111.5953724267.

It can be divided in two parts, 1389 and 756, that added together give a triangular number (2145 = T₆₅).

The spelling of 1389756 in words is "one million, three hundred eighty-nine thousand, seven hundred fifty-six".