1388503938 has 16 divisors (see below), whose sum is σ = 2781268416. Its totient is φ = 462124560.

The previous prime is 1388503931. The next prime is 1388503999. The reversal of 1388503938 is 8393058831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1388503931) 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 7 ways as a sum of consecutive naturals, for example, 173278 + ... + 181113.

It is an arithmetic number, because the mean of its divisors is an integer number (173829276).

Almost surely, 2^1388503938 is an apocalyptic number.

1388503938 is an abundant number, since it is smaller than the sum of its proper divisors (1392764478).

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

1388503938 is a wasteful number, since it uses less digits than its factorization.

1388503938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355049.

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 1388503938 is about 37262.6346089484. The cubic root of 1388503938 is about 1115.6184944218.

The spelling of 1388503938 in words is "one billion, three hundred eighty-eight million, five hundred three thousand, nine hundred thirty-eight".