1389164816 has 40 divisors (see below), whose sum is σ = 2901064320. Its totient is φ = 640596096.

The previous prime is 1389164797. The next prime is 1389164893. The reversal of 1389164816 is 6184619831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327155 + ... + 331373.

It is an arithmetic number, because the mean of its divisors is an integer number (72526608).

Almost surely, 2^1389164816 is an apocalyptic number.

1389164816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1389164816 is an abundant number, since it is smaller than the sum of its proper divisors (1511899504).

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

1389164816 is a wasteful number, since it uses less digits than its factorization.

1389164816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823 (or 5817 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The square root of 1389164816 is about 37271.5013918141. The cubic root of 1389164816 is about 1115.7954644579.

The spelling of 1389164816 in words is "one billion, three hundred eighty-nine million, one hundred sixty-four thousand, eight hundred sixteen".