381989447424 has 360 divisors, whose sum is σ = 1233881628672. Its totient is φ = 116841553920.

The previous prime is 381989447363. The next prime is 381989447501. The reversal of 381989447424 is 424744989183.

381989447424 is a `hidden beast` number, since 3 + 81 + 9 + 8 + 94 + 47 + 424 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46631169 + ... + 46639359.

Almost surely, 2^381989447424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381989447424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616940814336).

381989447424 is an abundant number, since it is smaller than the sum of its proper divisors (851892181248).

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

381989447424 is a wasteful number, since it uses less digits than its factorization.

381989447424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405 (or 8382 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 381989447424 in words is "three hundred eighty-one billion, nine hundred eighty-nine million, four hundred forty-seven thousand, four hundred twenty-four".