9998776 has 8 divisors (see below), whose sum is σ = 18747720. Its totient is φ = 4999384.

The previous prime is 9998753. The next prime is 9998777. The reversal of 9998776 is 6778999.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624916 + ... + 624931.

It is an arithmetic number, because the mean of its divisors is an integer number (2343465).

Almost surely, 2^9998776 is an apocalyptic number.

It is an amenable number.

9998776 is a deficient number, since it is larger than the sum of its proper divisors (8748944).

9998776 is a wasteful number, since it uses less digits than its factorization.

9998776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249853 (or 1249849 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 55.

The square root of 9998776 is about 3162.0841228532. The cubic root of 9998776 is about 215.4346785510.

The spelling of 9998776 in words is "nine million, nine hundred ninety-eight thousand, seven hundred seventy-six".