258005775 has 12 divisors (see below), whose sum is σ = 426569672. Its totient is φ = 137603040.

The previous prime is 258005747. The next prime is 258005791. The reversal of 258005775 is 577500852.

It is not a de Polignac number, because 258005775 - 2⁶ = 258005711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1719964 + ... + 1720113.

Almost surely, 2^258005775 is an apocalyptic number.

258005775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

258005775 is a deficient number, since it is larger than the sum of its proper divisors (168563897).

258005775 is a wasteful number, since it uses less digits than its factorization.

258005775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440090 (or 3440085 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 39.

The square root of 258005775 is about 16062.5581711009. The cubic root of 258005775 is about 636.6144259040.

The spelling of 258005775 in words is "two hundred fifty-eight million, five thousand, seven hundred seventy-five".