1388113520 has 40 divisors (see below), whose sum is σ = 3230805120. Its totient is φ = 554653440.

The previous prime is 1388113483. The next prime is 1388113537. The reversal of 1388113520 is 253118831.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70526 + ... + 88034.

It is an arithmetic number, because the mean of its divisors is an integer number (80770128).

Almost surely, 2^1388113520 is an apocalyptic number.

1388113520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388113520 is an abundant number, since it is smaller than the sum of its proper divisors (1842691600).

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

1388113520 is a wasteful number, since it uses less digits than its factorization.

1388113520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18513 (or 18507 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1388113520 is about 37257.3955074694. The cubic root of 1388113520 is about 1115.5139218290.

The spelling of 1388113520 in words is "one billion, three hundred eighty-eight million, one hundred thirteen thousand, five hundred twenty".