258948438 has 48 divisors (see below), whose sum is σ = 603805104. Its totient is φ = 73819200.

The previous prime is 258948377. The next prime is 258948449. The reversal of 258948438 is 834849852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198388 + ... + 199688.

It is an arithmetic number, because the mean of its divisors is an integer number (12579273).

Almost surely, 2^258948438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258948438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301902552).

258948438 is an abundant number, since it is smaller than the sum of its proper divisors (344856666).

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

258948438 is a wasteful number, since it uses less digits than its factorization.

258948438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997 (or 1990 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 51.

The square root of 258948438 is about 16091.8749062998. The cubic root of 258948438 is about 637.3888058275.

The spelling of 258948438 in words is "two hundred fifty-eight million, nine hundred forty-eight thousand, four hundred thirty-eight".