1389355398 has 48 divisors (see below), whose sum is σ = 3077146800. Its totient is φ = 452917440.

The previous prime is 1389355367. The next prime is 1389355421. The reversal of 1389355398 is 8935539831.

It is a happy number.

1389355398 is a `hidden beast` number, since 1 + 3 + 89 + 3 + 553 + 9 + 8 = 666.

1389355398 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193008 + ... + 200076.

It is an arithmetic number, because the mean of its divisors is an integer number (64107225).

Almost surely, 2^1389355398 is an apocalyptic number.

1389355398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1389355398 is an abundant number, since it is smaller than the sum of its proper divisors (1687791402).

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

1389355398 is a wasteful number, since it uses less digits than its factorization.

1389355398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7317 (or 7314 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 1389355398 is about 37274.0579760240. The cubic root of 1389355398 is about 1115.8464881149.

The spelling of 1389355398 in words is "one billion, three hundred eighty-nine million, three hundred fifty-five thousand, three hundred ninety-eight".