258448891 has 4 divisors (see below), whose sum is σ = 266785984. Its totient is φ = 250111800.

The previous prime is 258448873. The next prime is 258448913. The reversal of 258448891 is 198844852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 258448891 - 2¹⁹ = 257924603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258448291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4168500 + ... + 4168561.

It is an arithmetic number, because the mean of its divisors is an integer number (66696496).

Almost surely, 2^258448891 is an apocalyptic number.

258448891 is a deficient number, since it is larger than the sum of its proper divisors (8337093).

258448891 is an equidigital number, since it uses as much as digits as its factorization.

258448891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8337092.

The product of its digits is 737280, while the sum is 49.

The square root of 258448891 is about 16076.3456979501. The cubic root of 258448891 is about 636.9786718804.

The spelling of 258448891 in words is "two hundred fifty-eight million, four hundred forty-eight thousand, eight hundred ninety-one".