389402489984580 has 36 divisors (see below), whose sum is σ = 1181187552953772. Its totient is φ = 103840663995840.

The previous prime is 389402489984579. The next prime is 389402489984593. The reversal of 389402489984580 is 85489984204983.

389402489984580 is a `hidden beast` number, since 3 + 8 + 9 + 4 + 0 + 2 + 489 + 9 + 84 + 58 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 222188418632196 + 167214071352384 = 14905986^2 + 12931128^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 389402489984580.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1081673583111 + ... + 1081673583470.

It is an arithmetic number, because the mean of its divisors is an integer number (32810765359827).

Almost surely, 2^{389402489984580} is an apocalyptic number.

389402489984580 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389402489984580 is an abundant number, since it is smaller than the sum of its proper divisors (791785062969192).

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

389402489984580 is a wasteful number, since it uses less digits than its factorization.

389402489984580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163347166596 (or 2163347166591 counting only the distinct ones).

The product of its (nonzero) digits is 5733089280, while the sum is 81.

The spelling of 389402489984580 in words is "three hundred eighty-nine trillion, four hundred two billion, four hundred eighty-nine million, nine hundred eighty-four thousand, five hundred eighty".