990158 has 8 divisors (see below), whose sum is σ = 1599528. Its totient is φ = 456984.

The previous prime is 990151. The next prime is 990163. The reversal of 990158 is 851099.

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

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990158.

It is not an unprimeable number, because it can be changed into a prime (990151) by changing a digit.

990158 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19016 + ... + 19067.

It is an arithmetic number, because the mean of its divisors is an integer number (199941).

2⁹⁹⁰¹⁵⁸ is an apocalyptic number.

990158 is a deficient number, since it is larger than the sum of its proper divisors (609370).

990158 is a wasteful number, since it uses less digits than its factorization.

990158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38098.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 990158 is about 995.0668319264. The cubic root of 990158 is about 99.6708511322.

The spelling of 990158 in words is "nine hundred ninety thousand, one hundred fifty-eight".