391984804224 has 512 divisors, whose sum is σ = 1291039948800. Its totient is φ = 116270899200.

The previous prime is 391984804187. The next prime is 391984804229. The reversal of 391984804224 is 422408489193.

It is a happy number.

391984804224 is a `hidden beast` number, since 3 + 91 + 98 + 48 + 0 + 422 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391984804229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 600282682 + ... + 600283334.

It is an arithmetic number, because the mean of its divisors is an integer number (2521562400).

Almost surely, 2^391984804224 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 391984804224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645519974400).

391984804224 is an abundant number, since it is smaller than the sum of its proper divisors (899055144576).

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

391984804224 is a wasteful number, since it uses less digits than its factorization.

391984804224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 391984804224 in words is "three hundred ninety-one billion, nine hundred eighty-four million, eight hundred four thousand, two hundred twenty-four".