1388768232 has 32 divisors (see below), whose sum is σ = 3476260800. Its totient is φ = 462344064.

The previous prime is 1388768209. The next prime is 1388768257. The reversal of 1388768232 is 2328678831.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 16348 + ... + 55179.

It is an arithmetic number, because the mean of its divisors is an integer number (108633150).

Almost surely, 2^1388768232 is an apocalyptic number.

1388768232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1388768232 is an abundant number, since it is smaller than the sum of its proper divisors (2087492568).

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

1388768232 is a wasteful number, since it uses less digits than its factorization.

1388768232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72345 (or 72341 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 1388768232 is about 37266.1808078048. The cubic root of 1388768232 is about 1115.6892738558.

The spelling of 1388768232 in words is "one billion, three hundred eighty-eight million, seven hundred sixty-eight thousand, two hundred thirty-two".