1389428545372 has 72 divisors (see below), whose sum is σ = 2879238071808. Its totient is φ = 574589551200.

The previous prime is 1389428545331. The next prime is 1389428545391. The reversal of 1389428545372 is 2735458249831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389428545372.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4233297 + ... + 4549687.

It is an arithmetic number, because the mean of its divisors is an integer number (39989417664).

Almost surely, 2^{1389428545372} 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 1389428545372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439619035904).

1389428545372 is an abundant number, since it is smaller than the sum of its proper divisors (1489809526436).

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

1389428545372 is a wasteful number, since it uses less digits than its factorization.

1389428545372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316567 (or 316518 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 61.

The spelling of 1389428545372 in words is "one trillion, three hundred eighty-nine billion, four hundred twenty-eight million, five hundred forty-five thousand, three hundred seventy-two".