1389174812 has 12 divisors (see below), whose sum is σ = 2431958256. Its totient is φ = 694329600.

The previous prime is 1389174803. The next prime is 1389174827. The reversal of 1389174812 is 2184719831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52064 + ... + 74087.

It is an arithmetic number, because the mean of its divisors is an integer number (202663188).

Almost surely, 2^1389174812 is an apocalyptic number.

It is an amenable number.

1389174812 is a deficient number, since it is larger than the sum of its proper divisors (1042783444).

1389174812 is a wasteful number, since it uses less digits than its factorization.

1389174812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128908 (or 128906 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 1389174812 is about 37271.6354886662. The cubic root of 1389174812 is about 1115.7981407578.

The spelling of 1389174812 in words is "one billion, three hundred eighty-nine million, one hundred seventy-four thousand, eight hundred twelve".