384432561 has 24 divisors (see below), whose sum is σ = 579726784. Its totient is φ = 254566800.

The previous prime is 384432551. The next prime is 384432583. The reversal of 384432561 is 165234483.

It is not a de Polignac number, because 384432561 - 2¹¹ = 384430513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384432541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31455 + ... + 41931.

Almost surely, 2^384432561 is an apocalyptic number.

It is an amenable number.

384432561 is a deficient number, since it is larger than the sum of its proper divisors (195294223).

384432561 is a wasteful number, since it uses less digits than its factorization.

384432561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643 (or 10631 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 384432561 is about 19606.9518538706. The cubic root of 384432561 is about 727.1210567671.

The spelling of 384432561 in words is "three hundred eighty-four million, four hundred thirty-two thousand, five hundred sixty-one".