998778896 has 20 divisors (see below), whose sum is σ = 1935877584. Its totient is φ = 499197600.

The previous prime is 998778877. The next prime is 998778899. The reversal of 998778896 is 698877899.

It is not an unprimeable number, because it can be changed into a prime (998778899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37031 + ... + 58041.

Almost surely, 2^998778896 is an apocalyptic number.

It is an amenable number.

998778896 is a deficient number, since it is larger than the sum of its proper divisors (937098688).

998778896 is a wasteful number, since it uses less digits than its factorization.

998778896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23990 (or 23984 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 71.

The square root of 998778896 is about 31603.4633545123. The cubic root of 998778896 is about 999.5927995436.

The spelling of 998778896 in words is "nine hundred ninety-eight million, seven hundred seventy-eight thousand, eight hundred ninety-six".