99644454 has 96 divisors (see below), whose sum is σ = 268369920. Its totient is φ = 26018496.

The previous prime is 99644449. The next prime is 99644507. The reversal of 99644454 is 45444699.

It is a congruent number.

It is an unprimeable 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 47 ways as a sum of consecutive naturals, for example, 207787 + ... + 208265.

It is an arithmetic number, because the mean of its divisors is an integer number (2795520).

Almost surely, 2^99644454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99644454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134184960).

99644454 is an abundant number, since it is smaller than the sum of its proper divisors (168725466).

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

99644454 is a wasteful number, since it uses less digits than its factorization.

99644454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 631 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 99644454 is about 9982.2068702266. The cubic root of 99644454 is about 463.6081306704.

The spelling of 99644454 in words is "ninety-nine million, six hundred forty-four thousand, four hundred fifty-four".