9720026 has 4 divisors (see below), whose sum is σ = 14580042. Its totient is φ = 4860012.

The previous prime is 9719989. The next prime is 9720031. The reversal of 9720026 is 6200279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6200279 = 31 ⋅200009.

It can be written as a sum of positive squares in only one way, i.e., 9006001 + 714025 = 3001^2 + 845^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9719977 and 9720004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2430005 + ... + 2430008.

Almost surely, 2^9720026 is an apocalyptic number.

9720026 is a deficient number, since it is larger than the sum of its proper divisors (4860016).

9720026 is a wasteful number, since it uses less digits than its factorization.

9720026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860015.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 9720026 is about 3117.6956233731. The cubic root of 9720026 is about 213.4137885557.

The spelling of 9720026 in words is "nine million, seven hundred twenty thousand, twenty-six".