9907740 has 72 divisors (see below), whose sum is σ = 31646160. Its totient is φ = 2502144.

The previous prime is 9907717. The next prime is 9907769. The reversal of 9907740 is 477099.

9907740 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9907695 and 9907704.

It is a congruent number.

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, 1972 + ... + 4868.

It is an arithmetic number, because the mean of its divisors is an integer number (439530).

Almost surely, 2^9907740 is an apocalyptic number.

9907740 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9907740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15823080).

9907740 is an abundant number, since it is smaller than the sum of its proper divisors (21738420).

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

9907740 is a wasteful number, since it uses less digits than its factorization.

9907740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931 (or 2926 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 9907740 is about 3147.6562709419. The cubic root of 9907740 is about 214.7788604187.

The spelling of 9907740 in words is "nine million, nine hundred seven thousand, seven hundred forty".