258878478 has 32 divisors (see below), whose sum is σ = 541069056. Its totient is φ = 82418688.

The previous prime is 258878443. The next prime is 258878479. The reversal of 258878478 is 874878852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258878479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158301 + ... + 159927.

It is an arithmetic number, because the mean of its divisors is an integer number (16908408).

Almost surely, 2^258878478 is an apocalyptic number.

258878478 is an abundant number, since it is smaller than the sum of its proper divisors (282190578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258878478 is a wasteful number, since it uses less digits than its factorization.

258878478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808.

The product of its digits is 8028160, while the sum is 57.

The square root of 258878478 is about 16089.7009916282. The cubic root of 258878478 is about 637.3313996278.

The spelling of 258878478 in words is "two hundred fifty-eight million, eight hundred seventy-eight thousand, four hundred seventy-eight".