389328480 has 144 divisors (see below), whose sum is σ = 1374544080. Its totient is φ = 100230144.

The previous prime is 389328469. The next prime is 389328517. The reversal of 389328480 is 84823983.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×389328480² = 303153330678220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37099 + ... + 46421.

It is an arithmetic number, because the mean of its divisors is an integer number (9545445).

Almost surely, 2^389328480 is an apocalyptic number.

389328480 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 389328480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687272040).

389328480 is an abundant number, since it is smaller than the sum of its proper divisors (985215600).

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

389328480 is a wasteful number, since it uses less digits than its factorization.

389328480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9373 (or 9362 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 389328480 is about 19731.4084646788. The cubic root of 389328480 is about 730.1947813252.

The spelling of 389328480 in words is "three hundred eighty-nine million, three hundred twenty-eight thousand, four hundred eighty".