258787216 has 20 divisors (see below), whose sum is σ = 509900400. Its totient is φ = 127200032.

The previous prime is 258787211. The next prime is 258787253. The reversal of 258787216 is 612787852.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (258787211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136126 + ... + 138013.

It is an arithmetic number, because the mean of its divisors is an integer number (25495020).

Almost surely, 2^258787216 is an apocalyptic number.

It is an amenable number.

258787216 is a deficient number, since it is larger than the sum of its proper divisors (251113184).

258787216 is a wasteful number, since it uses less digits than its factorization.

258787216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274206 (or 274200 counting only the distinct ones).

The product of its digits is 376320, while the sum is 46.

The square root of 258787216 is about 16086.8647038508. The cubic root of 258787216 is about 637.2564983654.

The spelling of 258787216 in words is "two hundred fifty-eight million, seven hundred eighty-seven thousand, two hundred sixteen".