998227816 has 8 divisors (see below), whose sum is σ = 1871677170. Its totient is φ = 499113904.

The previous prime is 998227801. The next prime is 998227817. The reversal of 998227816 is 618722899.

It can be written as a sum of positive squares in only one way, i.e., 891022500 + 107205316 = 29850^2 + 10354^2 .

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

It is a super-2 number, since 2×998227816² = 1992917545272259712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (998227817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62389231 + ... + 62389246.

Almost surely, 2^998227816 is an apocalyptic number.

It is an amenable number.

998227816 is a deficient number, since it is larger than the sum of its proper divisors (873449354).

998227816 is a wasteful number, since it uses less digits than its factorization.

998227816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124778483 (or 124778479 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 998227816 is about 31594.7434868524. The cubic root of 998227816 is about 999.4089226965.

The spelling of 998227816 in words is "nine hundred ninety-eight million, two hundred twenty-seven thousand, eight hundred sixteen".