1388063880 has 192 divisors, whose sum is σ = 5295363840. Its totient is φ = 308676096.

The previous prime is 1388063783. The next prime is 1388063881. The reversal of 1388063880 is 883608831.

1388063880 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 0 + 638 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1388063881) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 85797 + ... + 100683.

It is an arithmetic number, because the mean of its divisors is an integer number (27580020).

Almost surely, 2^1388063880 is an apocalyptic number.

1388063880 is a gapful number since it is divisible by the number (10) 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 1388063880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2647681920).

1388063880 is an abundant number, since it is smaller than the sum of its proper divisors (3907299960).

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

1388063880 is a wasteful number, since it uses less digits than its factorization.

1388063880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14948 (or 14941 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 1388063880 is about 37256.7293250495. The cubic root of 1388063880 is about 1115.5006244604.

The spelling of 1388063880 in words is "one billion, three hundred eighty-eight million, sixty-three thousand, eight hundred eighty".