1389933258 has 64 divisors (see below), whose sum is σ = 3359370240. Its totient is φ = 374516352.

The previous prime is 1389933253. The next prime is 1389933271. The reversal of 1389933258 is 8523399831.

It is a self number, because there is not a number n which added to its sum of digits gives 1389933258.

It is not an unprimeable number, because it can be changed into a prime (1389933253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177310 + ... + 184982.

It is an arithmetic number, because the mean of its divisors is an integer number (52490160).

Almost surely, 2^1389933258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389933258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679685120).

1389933258 is an abundant number, since it is smaller than the sum of its proper divisors (1969436982).

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

1389933258 is a wasteful number, since it uses less digits than its factorization.

1389933258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931.

The product of its digits is 1399680, while the sum is 51.

The square root of 1389933258 is about 37281.8086739364. The cubic root of 1389933258 is about 1116.0011674427.

The spelling of 1389933258 in words is "one billion, three hundred eighty-nine million, nine hundred thirty-three thousand, two hundred fifty-eight".