1388016812 has 24 divisors (see below), whose sum is σ = 2989575456. Its totient is φ = 549105408.

The previous prime is 1388016809. The next prime is 1388016859. The reversal of 1388016812 is 2186108831.

It is a Smith number, since the sum of its digits (38) 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, 1906253 + ... + 1906980.

It is an arithmetic number, because the mean of its divisors is an integer number (124565644).

Almost surely, 2^1388016812 is an apocalyptic number.

It is an amenable number.

1388016812 is an abundant number, since it is smaller than the sum of its proper divisors (1601558644).

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

1388016812 is a wasteful number, since it uses less digits than its factorization.

1388016812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813257 (or 3813255 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1388016812 is about 37256.0976485729. The cubic root of 1388016812 is about 1115.4880157763.

The spelling of 1388016812 in words is "one billion, three hundred eighty-eight million, sixteen thousand, eight hundred twelve".