1989398395 has 8 divisors (see below), whose sum is σ = 2527706304. Its totient is φ = 1497899904.

The previous prime is 1989398353. The next prime is 1989398419. The reversal of 1989398395 is 5938939891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1989398395 - 2¹³ = 1989390203 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11702259 + ... + 11702428.

It is an arithmetic number, because the mean of its divisors is an integer number (315963288).

Almost surely, 2^1989398395 is an apocalyptic number.

1989398395 is a deficient number, since it is larger than the sum of its proper divisors (538307909).

1989398395 is a wasteful number, since it uses less digits than its factorization.

1989398395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23404709.

The product of its digits is 18895680, while the sum is 64.

The square root of 1989398395 is about 44602.6725096154. The cubic root of 1989398395 is about 1257.6909071750.

The spelling of 1989398395 in words is "one billion, nine hundred eighty-nine million, three hundred ninety-eight thousand, three hundred ninety-five".