1389888198 has 48 divisors (see below), whose sum is σ = 3035425536. Its totient is φ = 459621360.

The previous prime is 1389888179. The next prime is 1389888221. The reversal of 1389888198 is 8918889831.

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, 1566511 + ... + 1567397.

It is an arithmetic number, because the mean of its divisors is an integer number (63238032).

Almost surely, 2^1389888198 is an apocalyptic number.

1389888198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1389888198 is an abundant number, since it is smaller than the sum of its proper divisors (1645537338).

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

1389888198 is a wasteful number, since it uses less digits than its factorization.

1389888198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1486 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 63.

The square root of 1389888198 is about 37281.2043528639. The cubic root of 1389888198 is about 1115.9891074976.

The spelling of 1389888198 in words is "one billion, three hundred eighty-nine million, eight hundred eighty-eight thousand, one hundred ninety-eight".