9998000730 has 96 divisors (see below), whose sum is σ = 27551888208. Its totient is φ = 2506752000.

The previous prime is 9998000729. The next prime is 9998000731. The reversal of 9998000730 is 370008999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9998000729) and next prime (9998000731).

It can be written as a sum of positive squares in 8 ways, for example, as 3262351689 + 6735649041 = 57117^2 + 82071^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9998000731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1834810 + ... + 1840250.

Almost surely, 2^9998000730 is an apocalyptic number.

9998000730 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9998000730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13775944104).

9998000730 is an abundant number, since it is smaller than the sum of its proper divisors (17553887478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9998000730 is a wasteful number, since it uses less digits than its factorization.

9998000730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672 (or 6669 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 9998000730 is about 99990.0031503150. The cubic root of 9998000730 is about 2154.2911039078.

The spelling of 9998000730 in words is "nine billion, nine hundred ninety-eight million, seven hundred thirty", and thus it is an aban number.