1389140814 has 32 divisors (see below), whose sum is σ = 2871751680. Its totient is φ = 447508800.

The previous prime is 1389140743. The next prime is 1389140833. The reversal of 1389140814 is 4180419831.

1389140814 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1389140814² = 3859424402241165192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146242 + ... + 155450.

It is an arithmetic number, because the mean of its divisors is an integer number (89742240).

Almost surely, 2^1389140814 is an apocalyptic number.

1389140814 is an abundant number, since it is smaller than the sum of its proper divisors (1482610866).

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

1389140814 is a wasteful number, since it uses less digits than its factorization.

1389140814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10056.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1389140814 is about 37271.1794017844. The cubic root of 1389140814 is about 1115.7890381801.

The spelling of 1389140814 in words is "one billion, three hundred eighty-nine million, one hundred forty thousand, eight hundred fourteen".