9920306 has 12 divisors (see below), whose sum is σ = 16356606. Its totient is φ = 4509120.

The previous prime is 9920303. The next prime is 9920311. The reversal of 9920306 is 6030299.

It can be written as a sum of positive squares in only one way, i.e., 9554281 + 366025 = 3091^2 + 605^2 .

It is a super-2 number, since 2×9920306² = 196824942267272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (9920303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20255 + ... + 20738.

Almost surely, 2^9920306 is an apocalyptic number.

9920306 is a deficient number, since it is larger than the sum of its proper divisors (6436300).

9920306 is a wasteful number, since it uses less digits than its factorization.

9920306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41017 (or 41006 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 9920306 is about 3149.6517267787. The cubic root of 9920306 is about 214.8696234973.

The spelling of 9920306 in words is "nine million, nine hundred twenty thousand, three hundred six".