258057778 has 8 divisors (see below), whose sum is σ = 422276400. Its totient is φ = 117298980.

The previous prime is 258057763. The next prime is 258057797. The reversal of 258057778 is 877750852.

It is a happy number.

258057778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 5864928 + ... + 5864971.

It is an arithmetic number, because the mean of its divisors is an integer number (52784550).

Almost surely, 2^258057778 is an apocalyptic number.

258057778 is a deficient number, since it is larger than the sum of its proper divisors (164218622).

258057778 is a wasteful number, since it uses less digits than its factorization.

258057778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729912.

The product of its (nonzero) digits is 1097600, while the sum is 49.

The square root of 258057778 is about 16064.1768541062. The cubic root of 258057778 is about 636.6571945023.

The spelling of 258057778 in words is "two hundred fifty-eight million, fifty-seven thousand, seven hundred seventy-eight".