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BaseRepresentation
bin111011100110101…
…100100111111110
32120200200021002222
4323212230213332
54021444444443
6243121245342
733531600614
oct7346544776
92520607088
10999999998
11473523888
1223aa93852
1312c23a19a
1496b4b6b4
155cbd1468
hex3b9ac9fe

999999998 has 8 divisors (see below), whose sum is σ = 1502172840. Its totient is φ = 499275720.

The previous prime is 999999937. The next prime is 1000000007. The reversal of 999999998 is 899999999.

Subtracting from 999999998 its reverse (899999999), we obtain a palindrome (99999999).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360413 + ... + 363176.

It is an arithmetic number, because the mean of its divisors is an integer number (187771605).

Almost surely, 2999999998 is an apocalyptic number.

999999998 is a deficient number, since it is larger than the sum of its proper divisors (502172842).

999999998 is a wasteful number, since it uses less digits than its factorization.

999999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724282.

The product of its digits is 344373768, while the sum is 80.

The square root of 999999998 is about 31622.7765700610. The cubic root of 999999998 is about 999.9999993333. Note that the first 6 decimals are identical.

The spelling of 999999998 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".