99999998730 has 24 divisors (see below), whose sum is σ = 259999996932. Its totient is φ = 26666666304.

The previous prime is 99999998687. The next prime is 99999998743. The reversal of 99999998730 is 3789999999.

It can be written as a sum of positive squares in 2 ways, for example, as 99533309121 + 466689609 = 315489^2 + 21603^2 .

It is a super-2 number, since 2×99999998730² (a number of 23 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99999998730.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555555459 + ... + 555555638.

Almost surely, 2^99999998730 is an apocalyptic number.

99999998730 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99999998730 is an abundant number, since it is smaller than the sum of its proper divisors (159999998202).

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

99999998730 is a wasteful number, since it uses less digits than its factorization.

99999998730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111111110 (or 1111111107 counting only the distinct ones).

The product of its (nonzero) digits is 803538792, while the sum is 81.

The spelling of 99999998730 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred thirty".