1388648912 has 20 divisors (see below), whose sum is σ = 3074865696. Its totient is φ = 595135200.

The previous prime is 1388648881. The next prime is 1388648929. The reversal of 1388648912 is 2198468831.

It is a super-3 number, since 3×1388648912³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6199214 + ... + 6199437.

Almost surely, 2^1388648912 is an apocalyptic number.

It is an amenable number.

1388648912 is an abundant number, since it is smaller than the sum of its proper divisors (1686216784).

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

1388648912 is a wasteful number, since it uses less digits than its factorization.

1388648912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12398666 (or 12398660 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 1388648912 is about 37264.5798580904. The cubic root of 1388648912 is about 1115.6573203943.

The spelling of 1388648912 in words is "one billion, three hundred eighty-eight million, six hundred forty-eight thousand, nine hundred twelve".