258872305 has 4 divisors (see below), whose sum is σ = 310646772. Its totient is φ = 207097840.

The previous prime is 258872303. The next prime is 258872333. The reversal of 258872305 is 503278852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91221601 + 167650704 = 9551^2 + 12948^2 .

It is not a de Polignac number, because 258872305 - 2¹ = 258872303 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258872303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25887226 + ... + 25887235.

It is an arithmetic number, because the mean of its divisors is an integer number (77661693).

Almost surely, 2^258872305 is an apocalyptic number.

It is an amenable number.

258872305 is a deficient number, since it is larger than the sum of its proper divisors (51774467).

258872305 is an equidigital number, since it uses as much as digits as its factorization.

258872305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51774466.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 258872305 is about 16089.5091596978. The cubic root of 258872305 is about 637.3263338300.

The spelling of 258872305 in words is "two hundred fifty-eight million, eight hundred seventy-two thousand, three hundred five".