99999828 has 36 divisors (see below), whose sum is σ = 253122688. Its totient is φ = 33287760.

The previous prime is 99999827. The next prime is 99999839. The reversal of 99999828 is 82899999.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34275 + ... + 37077.

Almost surely, 2^99999828 is an apocalyptic number.

It is an amenable number.

99999828 is an abundant number, since it is smaller than the sum of its proper divisors (153122860).

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

99999828 is a wasteful number, since it uses less digits than its factorization.

99999828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804 (or 3799 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The square root of 99999828 is about 9999.9913999963. The cubic root of 99999828 is about 464.1586172434.

The spelling of 99999828 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred twenty-eight".