1389925168 has 20 divisors (see below), whose sum is σ = 2851391160. Its totient is φ = 654082304.

The previous prime is 1389925139. The next prime is 1389925177. The reversal of 1389925168 is 8615299831.

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 3 ways as a sum of consecutive naturals, for example, 2554738 + ... + 2555281.

It is an arithmetic number, because the mean of its divisors is an integer number (142569558).

Almost surely, 2^1389925168 is an apocalyptic number.

It is an amenable number.

1389925168 is an abundant number, since it is smaller than the sum of its proper divisors (1461465992).

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

1389925168 is a wasteful number, since it uses less digits than its factorization.

1389925168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110044 (or 5110038 counting only the distinct ones).

The product of its digits is 933120, while the sum is 52.

The square root of 1389925168 is about 37281.7001758235. The cubic root of 1389925168 is about 1115.9990022387. Note that the first 3 decimals are identical.

The spelling of 1389925168 in words is "one billion, three hundred eighty-nine million, nine hundred twenty-five thousand, one hundred sixty-eight".