9998620812 has 72 divisors (see below), whose sum is σ = 27282659040. Its totient is φ = 3078028800.

The previous prime is 9998620787. The next prime is 9998620829. The reversal of 9998620812 is 2180268999.

9998620812 is a `hidden beast` number, since 9 + 9 + 9 + 8 + 620 + 8 + 1 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184189 + ... + 232212.

It is an arithmetic number, because the mean of its divisors is an integer number (378925820).

Almost surely, 2^9998620812 is an apocalyptic number.

9998620812 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

9998620812 is an abundant number, since it is smaller than the sum of its proper divisors (17284038228).

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

9998620812 is a wasteful number, since it uses less digits than its factorization.

9998620812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416463 (or 416458 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 9998620812 is about 99993.1038222137. The cubic root of 9998620812 is about 2154.3356397957.

The spelling of 9998620812 in words is "nine billion, nine hundred ninety-eight million, six hundred twenty thousand, eight hundred twelve".