99644100 has 36 divisors (see below), whose sum is σ = 288304464. Its totient is φ = 26571680.

The previous prime is 99644099. The next prime is 99644107. The reversal of 99644100 is 144699.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99644107) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 165774 + ... + 166373.

Almost surely, 2^99644100 is an apocalyptic number.

It is an amenable number.

99644100 is an abundant number, since it is smaller than the sum of its proper divisors (188660364).

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

99644100 is a wasteful number, since it uses less digits than its factorization.

99644100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332164 (or 332157 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 99644100 is about 9982.1891386609. The cubic root of 99644100 is about 463.6075816602.

Adding to 99644100 its reverse (144699), we get a palindrome (99788799).

It can be divided in two parts, 9 and 9644100, that multiplied together give a triangular number (86796900 = T₁₃₁₇₅).

The spelling of 99644100 in words is "ninety-nine million, six hundred forty-four thousand, one hundred".