389135808 has 252 divisors, whose sum is σ = 1245976680. Its totient is φ = 115706880.

The previous prime is 389135783. The next prime is 389135809. The reversal of 389135808 is 808531983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389135809) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10517166 + ... + 10517202.

Almost surely, 2^389135808 is an apocalyptic number.

389135808 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389135808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622988340).

389135808 is an abundant number, since it is smaller than the sum of its proper divisors (856840872).

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

389135808 is a wasteful number, since it uses less digits than its factorization.

389135808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 389135808 is about 19726.5254923415. The cubic root of 389135808 is about 730.0743078171.

The spelling of 389135808 in words is "three hundred eighty-nine million, one hundred thirty-five thousand, eight hundred eight".