998971776 has 192 divisors, whose sum is σ = 3238410240. Its totient is φ = 292838400.

The previous prime is 998971763. The next prime is 998971781. The reversal of 998971776 is 677179899.

It is a tau number, because it is divible by the number of its divisors (192).

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 23 ways as a sum of consecutive naturals, for example, 391561 + ... + 394103.

It is an arithmetic number, because the mean of its divisors is an integer number (16866720).

Almost surely, 2^998971776 is an apocalyptic number.

998971776 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998971776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1619205120).

998971776 is an abundant number, since it is smaller than the sum of its proper divisors (2239438464).

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

998971776 is a wasteful number, since it uses less digits than its factorization.

998971776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605 (or 2590 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 63.

The square root of 998971776 is about 31606.5147714834. The cubic root of 998971776 is about 999.6571411279.

The spelling of 998971776 in words is "nine hundred ninety-eight million, nine hundred seventy-one thousand, seven hundred seventy-six".