389963808 has 240 divisors, whose sum is σ = 1260173376. Its totient is φ = 117573120.

The previous prime is 389963807. The next prime is 389963837. The reversal of 389963808 is 808369983.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (389963807) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2392335 + ... + 2392497.

Almost surely, 2^389963808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389963808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630086688).

389963808 is an abundant number, since it is smaller than the sum of its proper divisors (870209568).

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

389963808 is a wasteful number, since it uses less digits than its factorization.

389963808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 389963808 is about 19747.5013102924. The cubic root of 389963808 is about 730.5917563697.

The spelling of 389963808 in words is "three hundred eighty-nine million, nine hundred sixty-three thousand, eight hundred eight".