99800 has 24 divisors (see below), whose sum is σ = 232500. Its totient is φ = 39840.

The previous prime is 99793. The next prime is 99809. The reversal of 99800 is 899.

It is a happy number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50 + ... + 449.

2⁹⁹⁸⁰⁰ is an apocalyptic number.

It is an amenable number.

99800 is an abundant number, since it is smaller than the sum of its proper divisors (132700).

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

99800 is a wasteful number, since it uses less digits than its factorization.

99800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 99800 is about 315.9113799786. The cubic root of 99800 is about 46.3849237583.

The spelling of 99800 in words is "ninety-nine thousand, eight hundred".