998818388 has 24 divisors (see below), whose sum is σ = 1807083264. Its totient is φ = 482558400.

The previous prime is 998818361. The next prime is 998818393. The reversal of 998818388 is 883818899.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 998818388.

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 7 ways as a sum of consecutive naturals, for example, 79856 + ... + 91512.

It is an arithmetic number, because the mean of its divisors is an integer number (75295136).

Almost surely, 2^998818388 is an apocalyptic number.

It is an amenable number.

998818388 is a deficient number, since it is larger than the sum of its proper divisors (808264876).

998818388 is a wasteful number, since it uses less digits than its factorization.

998818388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12383 (or 12381 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 62.

The square root of 998818388 is about 31604.0881532754. The cubic root of 998818388 is about 999.6059740973.

The spelling of 998818388 in words is "nine hundred ninety-eight million, eight hundred eighteen thousand, three hundred eighty-eight".