1389395616 has 96 divisors (see below), whose sum is σ = 4230535680. Its totient is φ = 391032576.

The previous prime is 1389395593. The next prime is 1389395629. The reversal of 1389395616 is 6165939831.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29595 + ... + 60453.

It is an arithmetic number, because the mean of its divisors is an integer number (44068080).

Almost surely, 2^1389395616 is an apocalyptic number.

1389395616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389395616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115267840).

1389395616 is an abundant number, since it is smaller than the sum of its proper divisors (2841140064).

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

1389395616 is a wasteful number, since it uses less digits than its factorization.

1389395616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30946 (or 30938 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 51.

The square root of 1389395616 is about 37274.5974626152. The cubic root of 1389395616 is about 1115.8572549020.

The spelling of 1389395616 in words is "one billion, three hundred eighty-nine million, three hundred ninety-five thousand, six hundred sixteen".