9998785364 has 12 divisors (see below), whose sum is σ = 17539439988. Its totient is φ = 4987516800.

The previous prime is 9998785361. The next prime is 9998785393. The reversal of 9998785364 is 4635878999.

It can be written as a sum of positive squares in 2 ways, for example, as 1788613264 + 8210172100 = 42292^2 + 90610^2 .

It is a super-2 number, since 2×9998785364² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9998785294 and 9998785303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998785361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2967077 + ... + 2970444.

It is an arithmetic number, because the mean of its divisors is an integer number (1461619999).

Almost surely, 2^9998785364 is an apocalyptic number.

It is an amenable number.

9998785364 is a deficient number, since it is larger than the sum of its proper divisors (7540654624).

9998785364 is a wasteful number, since it uses less digits than its factorization.

9998785364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937946 (or 5937944 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 68.

The square root of 9998785364 is about 99993.9266355712. The cubic root of 9998785364 is about 2154.3474580355.

The spelling of 9998785364 in words is "nine billion, nine hundred ninety-eight million, seven hundred eighty-five thousand, three hundred sixty-four".