258638643 has 8 divisors (see below), whose sum is σ = 383168400. Its totient is φ = 172425744.

The previous prime is 258638641. The next prime is 258638651. The reversal of 258638643 is 346836852.

It is a happy number.

258638643 is a `hidden beast` number, since 2 + 5 + 8 + 638 + 6 + 4 + 3 = 666.

It is not a de Polignac number, because 258638643 - 2¹ = 258638641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (258638641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4789578 + ... + 4789631.

It is an arithmetic number, because the mean of its divisors is an integer number (47896050).

Almost surely, 2^258638643 is an apocalyptic number.

258638643 is a deficient number, since it is larger than the sum of its proper divisors (124529757).

258638643 is an equidigital number, since it uses as much as digits as its factorization.

258638643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579218 (or 9579212 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 258638643 is about 16082.2462050548. The cubic root of 258638643 is about 637.1345226927.

The spelling of 258638643 in words is "two hundred fifty-eight million, six hundred thirty-eight thousand, six hundred forty-three".