389491454880 has 720 divisors, whose sum is σ = 1550019838752. Its totient is φ = 91344153600.

The previous prime is 389491454879. The next prime is 389491454917. The reversal of 389491454880 is 88454194983.

389491454880 is a `hidden beast` number, since 3 + 8 + 9 + 4 + 9 + 1 + 4 + 548 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 136998739 + ... + 137001581.

Almost surely, 2^389491454880 is an apocalyptic number.

389491454880 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 389491454880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775009919376).

389491454880 is an abundant number, since it is smaller than the sum of its proper divisors (1160528383872).

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

389491454880 is a wasteful number, since it uses less digits than its factorization.

389491454880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 389491454880 in words is "three hundred eighty-nine billion, four hundred ninety-one million, four hundred fifty-four thousand, eight hundred eighty".