9917420 has 24 divisors (see below), whose sum is σ = 21546000. Its totient is φ = 3829952.

The previous prime is 9917419. The next prime is 9917429. The reversal of 9917420 is 247199.

It is not an unprimeable number, because it can be changed into a prime (9917429) 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, 7970 + ... + 9129.

It is an arithmetic number, because the mean of its divisors is an integer number (897750).

Almost surely, 2^9917420 is an apocalyptic number.

It is an amenable number.

9917420 is an abundant number, since it is smaller than the sum of its proper divisors (11628580).

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

9917420 is a wasteful number, since it uses less digits than its factorization.

9917420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17137 (or 17135 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 9917420 is about 3149.1935475610. The cubic root of 9917420 is about 214.8487849641.

The spelling of 9917420 in words is "nine million, nine hundred seventeen thousand, four hundred twenty".