1388533368 has 96 divisors (see below), whose sum is σ = 3681360000. Its totient is φ = 435610560.

The previous prime is 1388533351. The next prime is 1388533381. The reversal of 1388533368 is 8633358831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2782383 + ... + 2782881.

It is an arithmetic number, because the mean of its divisors is an integer number (38347500).

Almost surely, 2^1388533368 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 1388533368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840680000).

1388533368 is an abundant number, since it is smaller than the sum of its proper divisors (2292826632).

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

1388533368 is a wasteful number, since it uses less digits than its factorization.

1388533368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 598 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 1388533368 is about 37263.0295064693. The cubic root of 1388533368 is about 1115.6263763873.

The spelling of 1388533368 in words is "one billion, three hundred eighty-eight million, five hundred thirty-three thousand, three hundred sixty-eight".