1389913712 has 60 divisors (see below), whose sum is σ = 2974131816. Its totient is φ = 624053760.

The previous prime is 1389913691. The next prime is 1389913717. The reversal of 1389913712 is 2173199831.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389913717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1393598 + ... + 1394594.

Almost surely, 2^1389913712 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 1389913712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487065908).

1389913712 is an abundant number, since it is smaller than the sum of its proper divisors (1584218104).

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

1389913712 is an equidigital number, since it uses as much as digits as its factorization.

1389913712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194 (or 1099 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 1389913712 is about 37281.5465344452. The cubic root of 1389913712 is about 1115.9959361457.

The spelling of 1389913712 in words is "one billion, three hundred eighty-nine million, nine hundred thirteen thousand, seven hundred twelve".