389215134 has 144 divisors (see below), whose sum is σ = 1083045600. Its totient is φ = 100900800.

The previous prime is 389215121. The next prime is 389215139. The reversal of 389215134 is 431512983.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389215139) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 746794 + ... + 747314.

It is an arithmetic number, because the mean of its divisors is an integer number (7521150).

Almost surely, 2^389215134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389215134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541522800).

389215134 is an abundant number, since it is smaller than the sum of its proper divisors (693830466).

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

389215134 is a wasteful number, since it uses less digits than its factorization.

389215134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 544 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 389215134 is about 19728.5360328637. The cubic root of 389215134 is about 730.1239134119.

The spelling of 389215134 in words is "three hundred eighty-nine million, two hundred fifteen thousand, one hundred thirty-four".