9999630 has 48 divisors (see below), whose sum is σ = 26221104. Its totient is φ = 2643840.

The previous prime is 9999601. The next prime is 9999637. The reversal of 9999630 is 369999.

9999630 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 630 = 666.

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

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11925 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (546273).

Almost surely, 2^9999630 is an apocalyptic number.

9999630 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 9999630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13110552).

9999630 is an abundant number, since it is smaller than the sum of its proper divisors (16221474).

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

9999630 is a wasteful number, since it uses less digits than its factorization.

9999630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 45.

The square root of 9999630 is about 3162.2191574905. The cubic root of 9999630 is about 215.4408118343.

The spelling of 9999630 in words is "nine million, nine hundred ninety-nine thousand, six hundred thirty".