9997788 has 48 divisors (see below), whose sum is σ = 24093216. Its totient is φ = 3225600.

The previous prime is 9997787. The next prime is 9997817. The reversal of 9997788 is 8877999.

It is a happy number.

9997788 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

Its product of digits (2286144) is a multiple of the sum of its prime factors (294).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88420 + ... + 88532.

It is an arithmetic number, because the mean of its divisors is an integer number (501942).

Almost surely, 2^9997788 is an apocalyptic number.

It is an amenable number.

9997788 is an abundant number, since it is smaller than the sum of its proper divisors (14095428).

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

9997788 is a wasteful number, since it uses less digits than its factorization.

9997788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 292 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 57.

The square root of 9997788 is about 3161.9278929160. The cubic root of 9997788 is about 215.4275824666.

The spelling of 9997788 in words is "nine million, nine hundred ninety-seven thousand, seven hundred eighty-eight".