258391965 has 32 divisors (see below), whose sum is σ = 448479360. Its totient is φ = 126279936.

The previous prime is 258391957. The next prime is 258391981. The reversal of 258391965 is 569193852.

It is a happy number.

It is not a de Polignac number, because 258391965 - 2³ = 258391957 is a prime.

It is a super-2 number, since 2×258391965² = 133532815153122450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22339 + ... + 31871.

It is an arithmetic number, because the mean of its divisors is an integer number (14014980).

Almost surely, 2^258391965 is an apocalyptic number.

It is an amenable number.

258391965 is a deficient number, since it is larger than the sum of its proper divisors (190087395).

258391965 is a wasteful number, since it uses less digits than its factorization.

258391965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9693.

The product of its digits is 583200, while the sum is 48.

The square root of 258391965 is about 16074.5751110255. The cubic root of 258391965 is about 636.9319014334.

The spelling of 258391965 in words is "two hundred fifty-eight million, three hundred ninety-one thousand, nine hundred sixty-five".