99990258 has 8 divisors (see below), whose sum is σ = 199980528. Its totient is φ = 33330084.

The previous prime is 99990239. The next prime is 99990263. The reversal of 99990258 is 85209999.

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

99990258 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 99990258.

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, 8332516 + ... + 8332527.

It is an arithmetic number, because the mean of its divisors is an integer number (24997566).

Almost surely, 2^99990258 is an apocalyptic number.

99990258 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.

99990258 is a wasteful number, since it uses less digits than its factorization.

99990258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665048.

The product of its (nonzero) digits is 524880, while the sum is 51.

The square root of 99990258 is about 9999.5128881361. The cubic root of 99990258 is about 464.1438100856.

The spelling of 99990258 in words is "ninety-nine million, nine hundred ninety thousand, two hundred fifty-eight".