258320405 has 12 divisors (see below), whose sum is σ = 360594540. Its totient is φ = 177133824.

The previous prime is 258320401. The next prime is 258320407. The reversal of 258320405 is 504023852.

258320405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 103591684 + 154728721 = 10178^2 + 12439^2 .

It is not a de Polignac number, because 258320405 - 2² = 258320401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258320401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 526940 + ... + 527429.

It is an arithmetic number, because the mean of its divisors is an integer number (30049545).

Almost surely, 2^258320405 is an apocalyptic number.

It is an amenable number.

258320405 is a deficient number, since it is larger than the sum of its proper divisors (102274135).

258320405 is a wasteful number, since it uses less digits than its factorization.

258320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054388 (or 1054381 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 258320405 is about 16072.3490815749. The cubic root of 258320405 is about 636.8730979342.

The spelling of 258320405 in words is "two hundred fifty-eight million, three hundred twenty thousand, four hundred five".