389485980 has 144 divisors (see below), whose sum is σ = 1347300864. Its totient is φ = 90224640.

The previous prime is 389485949. The next prime is 389485991. The reversal of 389485980 is 89584983.

It is a happy number.

389485980 is a `hidden beast` number, since 3 + 8 + 9 + 48 + 598 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34885 + ... + 44675.

It is an arithmetic number, because the mean of its divisors is an integer number (9356256).

Almost surely, 2^389485980 is an apocalyptic number.

389485980 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 389485980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673650432).

389485980 is an abundant number, since it is smaller than the sum of its proper divisors (957814884).

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

389485980 is a wasteful number, since it uses less digits than its factorization.

389485980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9836 (or 9831 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 389485980 is about 19735.3991598853. The cubic root of 389485980 is about 730.2932330433.

The spelling of 389485980 in words is "three hundred eighty-nine million, four hundred eighty-five thousand, nine hundred eighty".