258438726 has 96 divisors (see below), whose sum is σ = 729787968. Its totient is φ = 64143360.

The previous prime is 258438721. The next prime is 258438727. The reversal of 258438726 is 627834852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258438721) 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 47 ways as a sum of consecutive naturals, for example, 23206 + ... + 32486.

It is an arithmetic number, because the mean of its divisors is an integer number (7601958).

Almost surely, 2^258438726 is an apocalyptic number.

258438726 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 258438726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364893984).

258438726 is an abundant number, since it is smaller than the sum of its proper divisors (471349242).

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

258438726 is a wasteful number, since it uses less digits than its factorization.

258438726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326 (or 9323 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 258438726 is about 16076.0295471239. The cubic root of 258438726 is about 636.9703208120.

The spelling of 258438726 in words is "two hundred fifty-eight million, four hundred thirty-eight thousand, seven hundred twenty-six".