9998777444 has 12 divisors (see below), whose sum is σ = 17904787824. Its totient is φ = 4883123784.

The previous prime is 9998777429. The next prime is 9998777513. The reversal of 9998777444 is 4447778999.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29066042 + ... + 29066385.

It is an arithmetic number, because the mean of its divisors is an integer number (1492065652).

Almost surely, 2^9998777444 is an apocalyptic number.

It is an amenable number.

9998777444 is a deficient number, since it is larger than the sum of its proper divisors (7906010380).

9998777444 is a wasteful number, since it uses less digits than its factorization.

9998777444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58132474 (or 58132472 counting only the distinct ones).

The product of its digits is 128024064, while the sum is 68.

The square root of 9998777444 is about 99993.8870331582. The cubic root of 9998777444 is about 2154.3468892185.

The spelling of 9998777444 in words is "nine billion, nine hundred ninety-eight million, seven hundred seventy-seven thousand, four hundred forty-four".