1388241963 has 16 divisors (see below), whose sum is σ = 2057527200. Its totient is φ = 925102080.

The previous prime is 1388241941. The next prime is 1388241991. The reversal of 1388241963 is 3691428831.

It is not a de Polignac number, because 1388241963 - 2¹³ = 1388233771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388241563) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 63043 + ... + 82163.

It is an arithmetic number, because the mean of its divisors is an integer number (128595450).

Almost surely, 2^1388241963 is an apocalyptic number.

1388241963 is a deficient number, since it is larger than the sum of its proper divisors (669285237).

1388241963 is a wasteful number, since it uses less digits than its factorization.

1388241963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21819 (or 21813 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 1388241963 is about 37259.1191924876. The cubic root of 1388241963 is about 1115.5483271648.

The spelling of 1388241963 in words is "one billion, three hundred eighty-eight million, two hundred forty-one thousand, nine hundred sixty-three".