258395805 has 16 divisors (see below), whose sum is σ = 459370560. Its totient is φ = 137811024.

The previous prime is 258395803. The next prime is 258395833. The reversal of 258395805 is 508593852.

258395805 is a `hidden beast` number, since 258 + 395 + 8 + 0 + 5 = 666.

It is not a de Polignac number, because 258395805 - 2¹ = 258395803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258395803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 956887 + ... + 957156.

It is an arithmetic number, because the mean of its divisors is an integer number (28710660).

Almost surely, 2^258395805 is an apocalyptic number.

It is an amenable number.

258395805 is a deficient number, since it is larger than the sum of its proper divisors (200974755).

258395805 is a wasteful number, since it uses less digits than its factorization.

258395805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914057 (or 1914051 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 258395805 is about 16074.6945538632. The cubic root of 258395805 is about 636.9350565965.

The spelling of 258395805 in words is "two hundred fifty-eight million, three hundred ninety-five thousand, eight hundred five".