258979998 has 8 divisors (see below), whose sum is σ = 517960008. Its totient is φ = 86326664.

The previous prime is 258979957. The next prime is 258980017. The reversal of 258979998 is 899979852.

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

258979998 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21581661 + ... + 21581672.

It is an arithmetic number, because the mean of its divisors is an integer number (64745001).

Almost surely, 2^258979998 is an apocalyptic number.

258979998 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.

258979998 is a wasteful number, since it uses less digits than its factorization.

258979998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43163338.

The product of its digits is 29393280, while the sum is 66.

The square root of 258979998 is about 16092.8554955297. The cubic root of 258979998 is about 637.4146992366.

The spelling of 258979998 in words is "two hundred fifty-eight million, nine hundred seventy-nine thousand, nine hundred ninety-eight".