389940000 has 240 divisors, whose sum is σ = 1311555168. Its totient is φ = 101376000.

The previous prime is 389939987. The next prime is 389940007. The reversal of 389940000 is 49983.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (389940007) 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, 4019952 + ... + 4020048.

Almost surely, 2^389940000 is an apocalyptic number.

389940000 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 389940000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655777584).

389940000 is an abundant number, since it is smaller than the sum of its proper divisors (921615168).

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

389940000 is an equidigital number, since it uses as much as digits as its factorization.

389940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 389940000 is about 19746.8984906491. The cubic root of 389940000 is about 730.5768880818.

Adding to 389940000 its reverse (49983), we get a palindrome (389989983).

The spelling of 389940000 in words is "three hundred eighty-nine million, nine hundred forty thousand".