384431656 has 64 divisors (see below), whose sum is σ = 869760000. Its totient is φ = 159042240.

The previous prime is 384431647. The next prime is 384431687. The reversal of 384431656 is 656134483.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77161 + ... + 81991.

It is an arithmetic number, because the mean of its divisors is an integer number (13590000).

Almost surely, 2^384431656 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 384431656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434880000).

384431656 is an abundant number, since it is smaller than the sum of its proper divisors (485328344).

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

384431656 is a wasteful number, since it uses less digits than its factorization.

384431656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887 (or 4869 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 384431656 is about 19606.9287753080. The cubic root of 384431656 is about 727.1204861902.

The spelling of 384431656 in words is "three hundred eighty-four million, four hundred thirty-one thousand, six hundred fifty-six".