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998441641 = 2234344687
BaseRepresentation
bin111011100000110…
…000001010101001
32120120202002110001
4323200300022221
54021100113031
6243024023001
733512420401
oct7340601251
92516662401
10998441641
11472659a8a
1223a461a61
1312bb12a92
1496863801
155c9c4861
hex3b8302a9

998441641 has 4 divisors (see below), whose sum is σ = 998508672. Its totient is φ = 998374612.

The previous prime is 998441623. The next prime is 998441663. The reversal of 998441641 is 146144899.

998441641 is a nontrivial binomial coefficient, being equal to C(44687, 2).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 998441641 - 211 = 998439593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 998441591 and 998441600.

It is not an unprimeable number, because it can be changed into a prime (998441141) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1 + ... + 44686.

It is an arithmetic number, because the mean of its divisors is an integer number (249627168).

Almost surely, 2998441641 is an apocalyptic number.

998441641 is the 44686-th triangular number.

998441641 is the 14896-th centered nonagonal number.

It is an amenable number.

998441641 is a deficient number, since it is larger than the sum of its proper divisors (67031).

998441641 is a wasteful number, since it uses less digits than its factorization.

998441641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67030.

The product of its digits is 248832, while the sum is 46.

The square root of 998441641 is about 31598.1271755147. The cubic root of 998441641 is about 999.4802769347.

The spelling of 998441641 in words is "nine hundred ninety-eight million, four hundred forty-one thousand, six hundred forty-one".

Divisors: 1 22343 44687 998441641