99644480 has 112 divisors (see below), whose sum is σ = 270753840. Its totient is φ = 34603008.

The previous prime is 99644449. The next prime is 99644507. The reversal of 99644480 is 8444699.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 19219456 + 80425024 = 4384^2 + 8968^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70016 + ... + 71424.

It is an arithmetic number, because the mean of its divisors is an integer number (2417445).

Almost surely, 2^99644480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99644480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135376920).

99644480 is an abundant number, since it is smaller than the sum of its proper divisors (171109360).

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

99644480 is a wasteful number, since it uses less digits than its factorization.

99644480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1446 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 99644480 is about 9982.2081725438. The cubic root of 99644480 is about 463.6081709932.

The spelling of 99644480 in words is "ninety-nine million, six hundred forty-four thousand, four hundred eighty".