258267778 has 8 divisors (see below), whose sum is σ = 393752700. Its totient is φ = 127016880.

The previous prime is 258267769. The next prime is 258267797. The reversal of 258267778 is 877762852.

258267778 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 245141649 + 13126129 = 15657^2 + 3623^2 .

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

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, 1058353 + ... + 1058596.

Almost surely, 2^258267778 is an apocalyptic number.

258267778 is a deficient number, since it is larger than the sum of its proper divisors (135484922).

258267778 is a wasteful number, since it uses less digits than its factorization.

258267778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117012.

The product of its digits is 2634240, while the sum is 52.

The square root of 258267778 is about 16070.7118075087. The cubic root of 258267778 is about 636.8298454511.

The spelling of 258267778 in words is "two hundred fifty-eight million, two hundred sixty-seven thousand, seven hundred seventy-eight".