99928 has 8 divisors (see below), whose sum is σ = 187380. Its totient is φ = 49960.

The previous prime is 99923. The next prime is 99929. The reversal of 99928 is 82999.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6238 + ... + 6253.

2⁹⁹⁹²⁸ is an apocalyptic number.

It is an amenable number.

99928 is a deficient number, since it is larger than the sum of its proper divisors (87452).

99928 is a wasteful number, since it uses less digits than its factorization.

99928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12497 (or 12493 counting only the distinct ones).

The product of its digits is 11664, while the sum is 37.

The square root of 99928 is about 316.1139035221. The cubic root of 99928 is about 46.4047458483.

It can be divided in two parts, 9992 and 8, that added together give a 4-th power (10000 = 10⁴).

The spelling of 99928 in words is "ninety-nine thousand, nine hundred twenty-eight".