1398471389 has 8 divisors (see below), whose sum is σ = 1612397760. Its totient is φ = 1188081216.

The previous prime is 1398471353. The next prime is 1398471397. The reversal of 1398471389 is 9831748931.

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

It is a de Polignac number, because none of the positive numbers 2^k-1398471389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398471389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398471589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883199 + ... + 884780.

It is an arithmetic number, because the mean of its divisors is an integer number (201549720).

Almost surely, 2^1398471389 is an apocalyptic number.

It is an amenable number.

1398471389 is a deficient number, since it is larger than the sum of its proper divisors (213926371).

1398471389 is a wasteful number, since it uses less digits than its factorization.

1398471389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768099.

The product of its digits is 1306368, while the sum is 53.

The square root of 1398471389 is about 37396.1413651195. The cubic root of 1398471389 is about 1118.2816413724.

The spelling of 1398471389 in words is "one billion, three hundred ninety-eight million, four hundred seventy-one thousand, three hundred eighty-nine".