389840880 has 320 divisors, whose sum is σ = 1462906368. Its totient is φ = 84602880.

The previous prime is 389840863. The next prime is 389840887. The reversal of 389840880 is 88048983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389840887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1269687 + ... + 1269993.

Almost surely, 2^389840880 is an apocalyptic number.

389840880 is a gapful number since it is divisible by the number (30) 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 389840880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731453184).

389840880 is an abundant number, since it is smaller than the sum of its proper divisors (1073065488).

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

389840880 is a wasteful number, since it uses less digits than its factorization.

389840880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 389840880 is about 19744.3885699203. The cubic root of 389840880 is about 730.5149803372.

The spelling of 389840880 in words is "three hundred eighty-nine million, eight hundred forty thousand, eight hundred eighty".