1388814984 has 64 divisors (see below), whose sum is σ = 3905496000. Its totient is φ = 462932496.

The previous prime is 1388814961. The next prime is 1388815031. The reversal of 1388814984 is 4894188831.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1388814984.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22194 + ... + 57185.

It is an arithmetic number, because the mean of its divisors is an integer number (61023375).

Almost surely, 2^1388814984 is an apocalyptic number.

It is an amenable number.

1388814984 is an abundant number, since it is smaller than the sum of its proper divisors (2516681016).

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

1388814984 is an frugal number, since it uses more digits than its factorization.

1388814984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79406 (or 79384 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 54.

The square root of 1388814984 is about 37266.8080736733. The cubic root of 1388814984 is about 1115.7017933721.

The spelling of 1388814984 in words is "one billion, three hundred eighty-eight million, eight hundred fourteen thousand, nine hundred eighty-four".