99944478 has 24 divisors (see below), whose sum is σ = 216944208. Its totient is φ = 33253632.

The previous prime is 99944461. The next prime is 99944483. The reversal of 99944478 is 87444999.

It is a happy number.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 5575 + ... + 15197.

It is an arithmetic number, because the mean of its divisors is an integer number (9039342).

Almost surely, 2^99944478 is an apocalyptic number.

99944478 is an abundant number, since it is smaller than the sum of its proper divisors (116999730).

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

99944478 is a wasteful number, since it uses less digits than its factorization.

99944478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10208 (or 10205 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 99944478 is about 9997.2235145564. The cubic root of 99944478 is about 464.0729640262.

The spelling of 99944478 in words is "ninety-nine million, nine hundred forty-four thousand, four hundred seventy-eight".