1388605696 has 81 divisors (see below), whose sum is σ = 2966073439. Its totient is φ = 648691712.

The previous prime is 1388605693. The next prime is 1388605711. The reversal of 1388605696 is 6965068831.

The square root of 1388605696 is 37264.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 194212096 + 1194393600 = 13936^2 + 34560^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388605693) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10135740 + ... + 10135876.

Almost surely, 2^1388605696 is an apocalyptic number.

1388605696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1388605696 is the 37264-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388605696

1388605696 is an abundant number, since it is smaller than the sum of its proper divisors (1577467743).

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

1388605696 is an frugal number, since it uses more digits than its factorization.

1388605696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The cubic root of 1388605696 is about 1115.6457468553.

The spelling of 1388605696 in words is "one billion, three hundred eighty-eight million, six hundred five thousand, six hundred ninety-six".