99644445 has 16 divisors (see below), whose sum is σ = 177145920. Its totient is φ = 53143632.

The previous prime is 99644443. The next prime is 99644449. The reversal of 99644445 is 54444699.

It is not a de Polignac number, because 99644445 - 2¹ = 99644443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 99644445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99644443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368919 + ... + 369188.

It is an arithmetic number, because the mean of its divisors is an integer number (11071620).

Almost surely, 2^99644445 is an apocalyptic number.

It is an amenable number.

99644445 is a deficient number, since it is larger than the sum of its proper divisors (77501475).

99644445 is a wasteful number, since it uses less digits than its factorization.

99644445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738121 (or 738115 counting only the distinct ones).

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

The square root of 99644445 is about 9982.2064194245. The cubic root of 99644445 is about 463.6081167126.

The spelling of 99644445 in words is "ninety-nine million, six hundred forty-four thousand, four hundred forty-five".