258983778 has 8 divisors (see below), whose sum is σ = 517967568. Its totient is φ = 86327924.

The previous prime is 258983773. The next prime is 258983801. The reversal of 258983778 is 877389852.

It is a happy number.

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

258983778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (258983773) 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, 21581976 + ... + 21581987.

It is an arithmetic number, because the mean of its divisors is an integer number (64745946).

Almost surely, 2^258983778 is an apocalyptic number.

258983778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258983778 is a wasteful number, since it uses less digits than its factorization.

258983778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43163968.

The product of its digits is 6773760, while the sum is 57.

The square root of 258983778 is about 16092.9729385220. The cubic root of 258983778 is about 637.4178003974.

The spelling of 258983778 in words is "two hundred fifty-eight million, nine hundred eighty-three thousand, seven hundred seventy-eight".