258078005 has 4 divisors (see below), whose sum is σ = 309693612. Its totient is φ = 206462400.

The previous prime is 258078001. The next prime is 258078019. The reversal of 258078005 is 500870852.

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 28313041 + 229764964 = 5321^2 + 15158^2 .

It is not a de Polignac number, because 258078005 - 2² = 258078001 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 (258078001) 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, 25807796 + ... + 25807805.

It is an arithmetic number, because the mean of its divisors is an integer number (77423403).

Almost surely, 2^258078005 is an apocalyptic number.

It is an amenable number.

258078005 is a deficient number, since it is larger than the sum of its proper divisors (51615607).

258078005 is an equidigital number, since it uses as much as digits as its factorization.

258078005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51615606.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 258078005 is about 16064.8064102871. The cubic root of 258078005 is about 636.6738281527.

The spelling of 258078005 in words is "two hundred fifty-eight million, seventy-eight thousand, five".