258208391 has 6 divisors (see below), whose sum is σ = 300364920. Its totient is φ = 221321436.

The previous prime is 258208387. The next prime is 258208429. The reversal of 258208391 is 193802852.

It is not a de Polignac number, because 258208391 - 2² = 258208387 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 (258208381) 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 5 ways as a sum of consecutive naturals, for example, 2634731 + ... + 2634828.

It is an arithmetic number, because the mean of its divisors is an integer number (50060820).

Almost surely, 2^258208391 is an apocalyptic number.

258208391 is a deficient number, since it is larger than the sum of its proper divisors (42156529).

258208391 is an equidigital number, since it uses as much as digits as its factorization.

258208391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269573 (or 5269566 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 258208391 is about 16068.8640233216. The cubic root of 258208391 is about 636.7810300789.

The spelling of 258208391 in words is "two hundred fifty-eight million, two hundred eight thousand, three hundred ninety-one".