258285478 has 16 divisors (see below), whose sum is σ = 426756096. Its totient is φ = 116261640.

The previous prime is 258285473. The next prime is 258285509. The reversal of 258285478 is 874582852.

It is a super-2 number, since 2×258285478² = 133422776291376968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258285473) 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 7 ways as a sum of consecutive naturals, for example, 54726 + ... + 59257.

It is an arithmetic number, because the mean of its divisors is an integer number (26672256).

Almost surely, 2^258285478 is an apocalyptic number.

258285478 is a deficient number, since it is larger than the sum of its proper divisors (168470618).

258285478 is a wasteful number, since it uses less digits than its factorization.

258285478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114099.

The product of its digits is 1433600, while the sum is 49.

The square root of 258285478 is about 16071.2624893006. The cubic root of 258285478 is about 636.8443931825.

The spelling of 258285478 in words is "two hundred fifty-eight million, two hundred eighty-five thousand, four hundred seventy-eight".