9913788 has 72 divisors (see below), whose sum is σ = 26968032. Its totient is φ = 3059712.

The previous prime is 9913753. The next prime is 9913807. The reversal of 9913788 is 8873199.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59281 + ... + 59447.

It is an arithmetic number, because the mean of its divisors is an integer number (374556).

Almost surely, 2^9913788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9913788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13484016).

9913788 is an abundant number, since it is smaller than the sum of its proper divisors (17054244).

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

9913788 is a wasteful number, since it uses less digits than its factorization.

9913788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 286 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9913788 is about 3148.6168391851. The cubic root of 9913788 is about 214.8225541478.

It can be divided in two parts, 99137 and 88, that added together give a square (99225 = 315²).

The spelling of 9913788 in words is "nine million, nine hundred thirteen thousand, seven hundred eighty-eight".