1389120816 has 40 divisors (see below), whose sum is σ = 3614773104. Its totient is φ = 459658240.

The previous prime is 1389120791. The next prime is 1389120823. The reversal of 1389120816 is 6180219831.

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 7 ways as a sum of consecutive naturals, for example, 99045 + ... + 112196.

Almost surely, 2^1389120816 is an apocalyptic number.

1389120816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1389120816 is an abundant number, since it is smaller than the sum of its proper divisors (2225652288).

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

1389120816 is a wasteful number, since it uses less digits than its factorization.

1389120816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211389 (or 211383 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1389120816 is about 37270.9111238242. The cubic root of 1389120816 is about 1115.7836838738.

The spelling of 1389120816 in words is "one billion, three hundred eighty-nine million, one hundred twenty thousand, eight hundred sixteen".