9999740 has 24 divisors (see below), whose sum is σ = 22235472.
Its totient is φ = 3764480.
The previous prime is 9999739. The next prime is 9999749. The reversal of 9999740 is 479999.
9999740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an Ulam 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 (9999749) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14366 + ... + 15045.
It is an arithmetic number, because the mean of its divisors is an integer number (926478).
Almost surely, 29999740 is an apocalyptic number.
It is an amenable number.
9999740 is an abundant number, since it is smaller than the sum of its proper divisors (12235732).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9999740 is a wasteful number, since it uses less digits than its factorization.
9999740 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 29437 (or 29435 counting only the distinct ones).
The product of its (nonzero) digits is 183708, while the sum is 47.
The square root of 9999740 is about 3162.2365502916.
The cubic root of 9999740 is about 215.4416018103.
The spelling of 9999740 in words is "nine million, nine hundred ninety-nine thousand, seven hundred forty".