9945690 has 16 divisors (see below), whose sum is σ = 23869728. Its totient is φ = 2652176.

The previous prime is 9945679. The next prime is 9945707. The reversal of 9945690 is 965499.

It is a happy number.

9945690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9945690² = 197833499152200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165732 + ... + 165791.

It is an arithmetic number, because the mean of its divisors is an integer number (1491858).

Almost surely, 2^9945690 is an apocalyptic number.

9945690 is an abundant number, since it is smaller than the sum of its proper divisors (13924038).

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

9945690 is a wasteful number, since it uses less digits than its factorization.

9945690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331533.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 9945690 is about 3153.6788041904. The cubic root of 9945690 is about 215.0527362973.

The spelling of 9945690 in words is "nine million, nine hundred forty-five thousand, six hundred ninety".