1389985245 has 64 divisors (see below), whose sum is σ = 2706739200. Its totient is φ = 671181120.

The previous prime is 1389985237. The next prime is 1389985301. The reversal of 1389985245 is 5425899831.

It is not a de Polignac number, because 1389985245 - 2³ = 1389985237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389985191 and 1389985200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 388776 + ... + 392334.

It is an arithmetic number, because the mean of its divisors is an integer number (42292800).

Almost surely, 2^1389985245 is an apocalyptic number.

1389985245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1389985245 is a deficient number, since it is larger than the sum of its proper divisors (1316753955).

1389985245 is a wasteful number, since it uses less digits than its factorization.

1389985245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847 (or 3841 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 1389985245 is about 37282.5058841275. The cubic root of 1389985245 is about 1116.0150810195.

The spelling of 1389985245 in words is "one billion, three hundred eighty-nine million, nine hundred eighty-five thousand, two hundred forty-five".