1389276 has 72 divisors (see below), whose sum is σ = 4149600. Its totient is φ = 383616.

The previous prime is 1389259. The next prime is 1389277. The reversal of 1389276 is 6729831.

1389276 is a `hidden beast` number, since 1 + 389 + 276 = 666.

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 Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1389276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389277) 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, 9250 + ... + 9398.

2^1389276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074800).

1389276 is an abundant number, since it is smaller than the sum of its proper divisors (2760324).

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

1389276 is a wasteful number, since it uses less digits than its factorization.

1389276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 198 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1389276 is about 1178.6755278702. The cubic root of 1389276 is about 111.5825231815.

The spelling of 1389276 in words is "one million, three hundred eighty-nine thousand, two hundred seventy-six".