384564621 has 16 divisors (see below), whose sum is σ = 606211200. Its totient is φ = 212173248.

The previous prime is 384564619. The next prime is 384564637. The reversal of 384564621 is 126465483.

It is not a de Polignac number, because 384564621 - 2¹ = 384564619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 384564621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384564601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315126 + ... + 316343.

It is an arithmetic number, because the mean of its divisors is an integer number (37888200).

Almost surely, 2^384564621 is an apocalyptic number.

It is an amenable number.

384564621 is a deficient number, since it is larger than the sum of its proper divisors (221646579).

384564621 is a wasteful number, since it uses less digits than its factorization.

384564621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631508.

The product of its digits is 138240, while the sum is 39.

The square root of 384564621 is about 19610.3192477838. The cubic root of 384564621 is about 727.2043072713.

The spelling of 384564621 in words is "three hundred eighty-four million, five hundred sixty-four thousand, six hundred twenty-one".