9980726 has 8 divisors (see below), whose sum is σ = 17109840. Its totient is φ = 4277448.

The previous prime is 9980723. The next prime is 9980731. The reversal of 9980726 is 6270899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9980726² = 199229782974152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356441 + ... + 356468.

It is an arithmetic number, because the mean of its divisors is an integer number (2138730).

Almost surely, 2^9980726 is an apocalyptic number.

9980726 is a deficient number, since it is larger than the sum of its proper divisors (7129114).

9980726 is a wasteful number, since it uses less digits than its factorization.

9980726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712918.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 9980726 is about 3159.2287033388. The cubic root of 9980726 is about 215.3049647333.

The spelling of 9980726 in words is "nine million, nine hundred eighty thousand, seven hundred twenty-six".