258620538 has 64 divisors (see below), whose sum is σ = 596865024. Its totient is φ = 73968000.

The previous prime is 258620519. The next prime is 258620543. The reversal of 258620538 is 835026852.

It is a junction number, because it is equal to n+sod(n) for n = 258620496 and 258620505.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 82345 + ... + 85427.

It is an arithmetic number, because the mean of its divisors is an integer number (9326016).

Almost surely, 2^258620538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258620538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298432512).

258620538 is an abundant number, since it is smaller than the sum of its proper divisors (338244486).

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

258620538 is a wasteful number, since it uses less digits than its factorization.

258620538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 258620538 is about 16081.6833074153. The cubic root of 258620538 is about 637.1196556313.

The spelling of 258620538 in words is "two hundred fifty-eight million, six hundred twenty thousand, five hundred thirty-eight".