1389221176284 has 144 divisors (see below), whose sum is σ = 3815237934144. Its totient is φ = 425051827200.

The previous prime is 1389221176283. The next prime is 1389221176289. The reversal of 1389221176284 is 4826711229831.

1389221176284 is a `hidden beast` number, since 1 + 3 + 8 + 9 + 2 + 2 + 1 + 1 + 7 + 628 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1389221176284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389221176283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1735402 + ... + 2406254.

It is an arithmetic number, because the mean of its divisors is an integer number (26494707876).

Almost surely, 2^{1389221176284} 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 1389221176284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907618967072).

1389221176284 is an abundant number, since it is smaller than the sum of its proper divisors (2426016757860).

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

1389221176284 is a wasteful number, since it uses less digits than its factorization.

1389221176284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670988 (or 670983 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 1389221176284 in words is "one trillion, three hundred eighty-nine billion, two hundred twenty-one million, one hundred seventy-six thousand, two hundred eighty-four".