258244778 has 8 divisors (see below), whose sum is σ = 422582400. Its totient is φ = 117383980.

The previous prime is 258244771. The next prime is 258244801. The reversal of 258244778 is 877442852.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (258244771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5869178 + ... + 5869221.

It is an arithmetic number, because the mean of its divisors is an integer number (52822800).

Almost surely, 2^258244778 is an apocalyptic number.

258244778 is a deficient number, since it is larger than the sum of its proper divisors (164337622).

258244778 is a wasteful number, since it uses less digits than its factorization.

258244778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11738412.

The product of its digits is 1003520, while the sum is 47.

The square root of 258244778 is about 16069.9962041066. The cubic root of 258244778 is about 636.8109406263.

The spelling of 258244778 in words is "two hundred fifty-eight million, two hundred forty-four thousand, seven hundred seventy-eight".