258879385 has 4 divisors (see below), whose sum is σ = 310655268. Its totient is φ = 207103504.

The previous prime is 258879377. The next prime is 258879391. The reversal of 258879385 is 583978852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141633801 + 117245584 = 11901^2 + 10828^2 .

It is a cyclic number.

It is not a de Polignac number, because 258879385 - 2³ = 258879377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25887934 + ... + 25887943.

It is an arithmetic number, because the mean of its divisors is an integer number (77663817).

Almost surely, 2^258879385 is an apocalyptic number.

It is an amenable number.

258879385 is a deficient number, since it is larger than the sum of its proper divisors (51775883).

258879385 is an equidigital number, since it uses as much as digits as its factorization.

258879385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51775882.

The product of its digits is 4838400, while the sum is 55.

The square root of 258879385 is about 16089.7291773355. The cubic root of 258879385 is about 637.3321439395.

The spelling of 258879385 in words is "two hundred fifty-eight million, eight hundred seventy-nine thousand, three hundred eighty-five".